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  • Springer  (681)
  • MDPI - Multidisciplinary Digital Publishing Institute  (37)
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  • 1
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    Fast-Growing Trees Species—Opportunities and Risks for Sustainable Agricultural and Forest Land Use Systems (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2022-07-06
    Description: The articles in this Special Issue cover a very wide range of topics related to the cultivation, management and use of fast-growing tree species. In addition to research on breeding and on the influence of pruning practices on the height growth of paulownia, three articles deal with the influence of site characteristics and nutrient availability on the physiology and yield security of fast-growing tree species. Another article focuses on the modeling of soil carbon in Salix plantations, while the article by Boruszewski et al. reports on potentially suitable areas for the planting of fast-growing tree species in Poland. Zitzmann and Rode examine the impact of short-rotation plantation management on phytodiversity, while Helbig et al. deal with the influence of leaf feeding on the growth of poplars and willows. Finally, Hernandez-Estrada et al. describe the dry matter loss of poplar wood chips during storage.
    Keywords: woody biomass crops ; bioenergy ; biodiversity ; species richness ; flora ; vascular plants ; short rotation coppices ; poplars ; willows ; feeding simulation ; defoliation ; herbivory ; short rotation coppice ; phosphatase activity ; nutrient content ; growth stages ; biomass ; willow ; Salix ; capacity ; European larch ; fast-growing trees ; plantations ; plantation area ; poplar cultivar “Hybrid 275” ; sown area ; biomass production ; life cycle assessment ; climate impact ; soil organic carbon ; genotypic difference ; CRISPR/Cas9 ; genome editing ; Populus ; INRA 717-1B4 ; pyramidal plant habitus ; leaf petiole angle ; branch angle ; nitrogen ; phosphorus ; carbon ; physiology ; F. mandshurica ; Robinia pseudoacacia L. ; photosynthetic vitality ; chlorophyll and phenol content ; nutrition supply ; dry matter yield ; land reclamation ; spring pruning ; year-long pruning ; branching ; angle diversion of sprout ; dry matter losses ; poplar wood chips ; laboratory scale ; cultivable saproxylic microbiota ; n/a ; bic Book Industry Communication::G Reference, information & interdisciplinary subjects::GP Research & information: general ; bic Book Industry Communication::P Mathematics & science::PS Biology, life sciences ; bic Book Industry Communication::K Economics, finance, business & management::KN Industry & industrial studies::KNA Primary industries::KNAL Forestry & related industries
    Language: English
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  • 2
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    Sustainable Residential Landscapes:An International Perspective (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-03-23
    Description: This book is a compilation of 10 recently published academic articles addressing sustainable residential landscape design and planning across geographies, scales, and perspectives: from American rain garden design to South Korean urban forestry; from Mexican community open space design to Australian neighborhood park planning; and from Chinese urban design to Bolivian land-use change. This volume brings together authors from a growing community of landscape sustainability scholars of landscape architecture and architecture; planning and construction; ecology and horticulture; agricultural and environmental sciences; and health, exercise, and nutrition. In summary, these papers address facets of a fundamental challenge for the 21st century: the design and planning of sustainable and resilient human settlements.
    Keywords: NA1-9428 ; NX1-820 ; carbon reduction ; intergenerational engagement ; tree planting structure ; urban tree ; All-Area Integrated Development ; residential landscapes ; small towns ; rural landscape architecture ; urban commons ; demolition/relocation-oriented market model (D/RMM) ; parks ; youth at risk ; spatial theory ; wellbeing ; building energy saving ; Guatemala ; land use change ; new rural construction model (NRCM) ; substrate ; phosphorus ; green infrastructure ; Origin Farmer Indigenous Territory ; dwellings ; residential sustainability ; residential neighborhood parks ; sustainable livelihoods ; sustainability ; ecological priority ; CPTED ; ecological service ; circular economy ; action research ; urban villages transformation ; cohousing ; public space recovery ; Bolivian Amazon ; design model ; social sustainability ; community service learning ; rural revitalization ; China ; coordinated development of rural communities & ; shared resources ; rain gardens ; tactical urbanism ; climate sensitive design ; prevention of gender-based violence ; polyculture ; comfort ; Indigenous versus non-indigenous land-use ; bioretention ; monoculture ; landscape performance evaluation ; low impact development ; governance ; territory ; thema EDItEUR::A The Arts::AM Architecture
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  • 3
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    Agroforestry Systems: The Role of Trees in Ecosystem Services—A Special Issue in Collaboration with the 4th World Congress on Agroforestry (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-05
    Description: Planting trees in the agricultural landscape, in the form of establishing agroforestry systems, has a significant role to play in potentially improving ecosystem services, such as increased biodiversity, reduced soil erosion, increased soil carbon storage, improved food security and nutrition, and reduced greenhouse gas emissions. While the role of trees in agroforestry systems in improving ecosystem services has been researched, studies in new systems/regions and new agroforestry system designs are still emerging. This Special Issue includes selected papers presented at the 4th World Congress on Agroforestry, Montpellier, France 20–22 May 2019, and other volunteer papers. The scope of articles includes all aspects of agroforestry systems.
    Keywords: QH301-705.5 ; Q1-390 ; S1-972 ; farmers’ knowledge ; ahannon-wiener index ; economic benefits ; alley cropping ; lignin ; shelterbelts ; agroforestry ; natural capital ; forest farming ; nutrient content ; agroforestry system ; review ; Amazonia ; cropland ; riparian buffers ; climate change ; subtropical acidic forest soil ; bees ; phosphorus ; pollination ; 15N tracing experiment ; stable isotope ; West Java ; interspecific competition ; growth form ; cropping system ; climate change mitigation ; gross N transformation rates ; East Africa ; improved-fallow ; N-fixing trees ; carbon sequestration ; home garden ; margalef index ; windbreaks ; leaf nutrient diagnosis ; agroforestry systems ; pollinators ; sorption ; forestland ; China ; temperature change ; fractionation ; hedgerows ; native trees ; slash-and-mulch ; soil N ; shade tree species ; soil C ; Alpinia oxyphylla ; sustainable management ; plant water use ; rubber-based agroforestry system ; ecosystem services ; Indonesia ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences
    Language: English
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    Physical Processes in Lakes (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-04-11
    Description: Physical processes are keys for the status of a lake. In this Special Issue, the emphasis is on dissolved oxygen and on exchange of gases, energy and momentum between atmosphere and further mixing and consumption within the water. The studies presented relate to ice-free as well as ice-covered lakes. Field measurements are combined with theoretical approaches.
    Keywords: hydrodynamic model ; bubble plume ; artificial mixing ; GLM ; Si3D ; dissolved gas ; Henry law ; total gas pressure ; ebullition ; greenhouse gases ; lacustrine waters ; diurnal variation ; hourly model ; water temperature ; dissolved oxygen ; shallow lakes ; and sediment heat flux ; water quality ; chlorophyll-a ; phosphorus ; phosphorus release ; full set of turbulent stresses ; Acoustic Doppler current profilers ; interbeam velocity correlations ; ice-covered lakes ; convectively-mixed layer ; anisotropic turbulence ; shallow lake ; ice-covered period ; ice phenology ; snow-ice cover thickness ; under-ice irradiance ; radiatively driven convection ; climate change ; 3D modelling ; stratification ; bubble plumes ; fractal ; lakes ; mixing ; multi-scale ; turbulence ; energy fluxes ; energy content ; reservoirs ; internal waves ; surface waves ; biogenic turbulence ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TQ Environmental science, engineering and technology
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    New Mineral Species and Their Crystal Structures (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2023-12-20
    Description: One last comment concerns the fundamental contributions of Fourier analysis to quantum physics: Quantum mechanics and quantum field theory.
    Keywords: Q1-390 ; self-electrorefining ; hedyphane group ; structural combinatorics ; CuFe2O4 ; Kamchatka ; Raman ; El Dragón ; apatite supergroup ; borate ; ariegilatite ; oyonite ; Tuscany ; gahnite ; magnesioferrite ; Szklary pegmatite ; aurihydrargyrumite ; Au6Hg5 phase ; Trentino ; Peru ; Germany ; cerromojonite ; sulfosalt ; pyrometamorphism ; Bellerberg volcano ; manganese ; gold ; spinel supergroup ; selenium ; CuAl2O4 ; clinokurchatovite ; sharyginite ; Poland ; copper ; kurchatovite ; copper oxide ; antimony ; nabimusaite group ; laachite ; lead ; thermaerogenite ; intercalated hexagonal antiperovskite ; placer ; Lower Silesia ; Eldfell ; Tolbachik volcano ; structural complexity ; nöggerathite-(Ce) ; Val di Fiemme ; Oyon district ; sanidinite ; cuprospinel ; sulfate ; fumarole sublimate ; Cretaio ; polymorphism ; polytypism ; tiberiobardiite ; fiemmeite ; stacking faults ; CO3-group ; Hatrurim Complex ; least-action principle ; phosphorus ; Laacher See ; new oxalate mineral ; Japan ; verneite ; alkaline volcanic rock ; arsenic ; Raman spectroscopy ; single-crystal investigation ; Rusinovite ; Eifel ; Lima department ; Italy ; barioferrite ; configurational entropy ; Hekla ; mercury ; Bolivia ; parafiniukite ; aluminofluoride ; new mineral ; Shadil-Khokh volcano ; Vesuvius ; bournonite group ; Ehime ; calcium ; lillianite homologous series ; chalcophyllite group ; sou?ekite ; silicate ; pyrometamorphic rocks ; crystal structure ; zirconolite ; bismuth ; bic Book Industry Communication::G Reference, information & interdisciplinary subjects::GP Research & information: general
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    Water Quality Assessments for Urban Water Environment (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2022-02-01
    Description: This special issue entitled “Water Quality Assessments for Urban Water Environment,” strives to highlights the status quo of water environment, opportunities and challenges for their sustainable management in lieu of rapid global changes (land us eland cover changes, climate change, population growth, change in socio-economic dimension, urbanization etc.), in the urban space particularly in developing nations around the world. It also highlights the effect of COVID19 pandemic on water resources and way forward to minimize the risk of spreading health risk associated with wastewater management. Considering the complex nature of the urban water security, it highlights the importance of emerging approaches like socio-hydrology, landscape ecology, regional-circular-ecological sphere etc., which presents a perfect combination of hard (infrastructure) and soft (numerical simulations, spatial technologies, participatory approaches, indigenous knowledge) measures, as the potential solutions to manage this precious water resource in coming future. Finally, what is the way forward to enhance science-policy interface in a better way to achieve global goals e.g., SDGs at local level in a timely manner. It provides valuable information about sustainable water resource management at the urban landscape, which is very much useful for policy-makers, decision-makers, local communities, and other relevant stakeholders.
    Keywords: groundwater ; geospatial analysis ; hydrogeochemical assessment ; multivariate statistical analysis ; water quality index ; middle and lower reaches of the Yangtze River ; urban river stretches ; phosphorus ; spatial distribution ; bioavailability ; suspended sediment (SS) ; water quality ; WEAP ; climate change adaptation ; urbanization ; domestic wastewater management ; sustainable development goals ; triple-rice cropping system ; full-dike ; surface water quality ; WAWQI ; An Giang Province ; the Vietnamese Mekong Delta ; hydrological residence time (HRT) ; lake ; COVID ; waterbodies ; WQI ; HPI ; HEI ; SARS-CoV-2 ; COVID-19 ; bioaerosol ; aerosolized wastewater ; environmental transmission ; agriculture ; water security ; water scarcity ; climate change ; IWRM ; socioeconomic changes ; sustainable development ; Pindrawan tank area ; drinking water quality ; artificial intelligence ; particle swarm optimization ; support vector machine ; naive Bayes classifier ; water insecurity ; water security framework ; public health ; primary health care ; groundwater demand ; Sundarbans ; vulnerability ; sensitivity loop ; water–human wellbeing nexus ; n/a ; bic Book Industry Communication::G Reference, information & interdisciplinary subjects::GP Research & information: general ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics::KCN Environmental economics
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    Tropical Forest Ecosystem Responses to Increasing Nutrient Availability (2021)
    Frontiers Media SA
    Details
    Publication Date: 2022-01-31
    Description: Deforestation and land use change have led to a strong reduction of tropical forest cover during the last decades. Climate change will amplify the pressure to the remaining refuges in the next years. In addition, tropical regions are facing increasing atmospheric inputs of nutrients, which will have unknown consequences for the structure and functioning of these systems, no matter if they are within protected areas or not. Even remote areas are expected to receive rising amounts of nutrients. The effects of higher rates of atmospheric nutrient deposition on the biological diversity and ecosystem functioning of tropical ecosystems are poorly understood and our knowledge of nutrient fluxes and nutrient limitation in tropical forest ecosystems is still limited. Yet, it will be of paramount importance to know the effects of increased nutrient availability to conserve these ecosystems with their biological and functional diversity. During the last years, research efforts have more and more focused on the understanding of the role of nutrients in tropical ecosystems and several coordinated projects have been established that study the effects of experimental nutrient addition. This Research Topic combines results from experiments and from observational studies with the aim to review and conclude on our current knowledge on the role of additional nutrients in ecosystems.
    Keywords: GB3-5030 ; Q1-390 ; experimental nutrient manipulation ; global change ; nitrogen ; CO2 ; nutrient limitation ; foliar nutrients ; biogeochemical cycles ; wood anatomy ; phosphorus
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  • 8
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    Current Advances and Challenges in Ocean Science—Feature Papers for the Founding of Oceans (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-03-27
    Description: This Special Issue is designed to celebrate the founding of the open-access journal Oceans and is focused on presenting new ideas and advances at the cutting edge of ocean science. The scope of this Special Issue includes, but is not limited to: ocean geosciences, physics, biogeochemistry, and ecology; ocean ecosystem services and sustainable ocean resource use; and ocean operations and engineering. The fifteen articles published in this Special Issue focus on diverse areas of oceanography, including ocean ecology and biology, ocean geosciences, ocean climate and meteorology, ocean circulation, ocean chemistry and biogeochemistry, ocean resources (e.g., fisheries, aquaculture, and mining), ocean engineering, ocean modeling and ocean governance.
    Keywords: SIDS ; UN Member States ; sustainable development goal 14 ; SAMOA pathway ; capacity building ; scientific infrastructure ; IAEA ; ocean challenges ; nuclear and isotopic techniques ; ecology ; oceanography ; Portugal ; abundance rate ; nursery ; common dolphin ; Delphinus delphis ; phytoplankton ; zooplankton ; time series ; regime shift ; climate ; nutrients ; composite ; delamination ; seawater ; immersion ; ageing ; Black Sea ; biogeochemical modelling ; seasonal phytoplankton and inter-annual variation ; capture–recapture ; Cayman Islands ; Seychelles ; monitoring ; endangered species ; maximum number of individuals ; photo-identification ; mark-recapture ; movement ecology ; phosphorus ; polyphosphates ; pyrophosphate ; pyrophosphatase activity ; seaweed ; Ulva ; ras al hadd oceanic dipole ; arabian sea ; cyclonic and anticyclonic eddies ; altimetric data ; angular momentum eddy detection and tracking algorithm (AMEDA) ; HYCOM model ; ARGO floats ; carbon cycle ; tropical Atlantic ; dissolved inorganic carbon ; alkalinity ; Demerara Rise ; millennial-scale variability ; Late Quaternary paleoclimate ; seafloor mapping ; vulnerable deep-sea habitats ; deep-sea corals ; chemosynthesis-based communities ; vulnerable marine ecosystem ; Atlantic Ocean ; seismic faults ; slope instabilities ; submarine volcanism ; fluid-flow processes ; bottom currents ; tsunamis ; canyon heads ; tectonic indentation ; multidisciplinary approach ; carbon ; eutrophic ; Hiroshima Bay ; nitrogen ; sulfur ; sediment ; ocean forecasting ; reflexivity ; fisheries ; harmful algal blooms ; coupled natural-human systems ; Anthropocene ocean ; shark ; luminescence ; Etmopteridae ; Dalatiidae ; Somniosidae ; photophore ; hormonal control ; counter-illumination ; thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GP Research and information: general
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  • 9
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    Productive and Ecological Aspects of Mixed Cropping System (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-03-27
    Description: Mixed cropping, also known as inter-cropping or co-cultivation, is a plant production system that involves planting two or more species (or cultivars) in the same field in a variable order—row or rowless—simultaneously. Mixed cropping plays an important role in sustainable agriculture by adding value to crop rotations and agroecosystems. Scientific investigations on environmentally friendly mixed cropping should be supported by studies on the direct costs and long-term benefits that are the most relevant to farmers. Meeting the need to strengthen the scientific basis for mixed crops, the papers in this Special Issue enhance our understanding of the following: The selection of species and cultivars for a mixed crop system as well as the choice of agricultural treatments that will secure a stable yield of mixtures; Inter- and intra- species competition of plants in a canopy; Ecological intensification approaches and opportunities for maximizing crop performance and yield in mixtures; The effects of mixed crops on crop rotations; The short- and long-term ecosystem benefits of mixtures; The effects on pests and the biodiversity of agroecosystems provided by mixtures; The economic aspects of adopting the mixtures in farms; The nutritive value of mixtures for livestock; Other topics related to the mixed cropping.
    Keywords: barley ; oats ; triticale ; yield ; leaf area index ; land equivalent ratio ; standard gross margin ; brachiaria ; cereal-livestock production ; perception ; push-pull technology ; smallholder farmers ; proximity effect ; border effect ; neighbor effect ; strip intercropping ; legume ; cereals ; Hordeum vulgare ; Lolium multiflorum ; phosphorus ; water stress ; competition indices ; plant development stages ; spring cereal mixtures ; grain yield ; protein yield ; metabolic energy yield ; differentiations of cereal mixture ; sustainable agriculture ; maize ; Zea mays L. ; biodiversity ; intercropping ; silage ; growth ; quality ; non-legume ; mixed crop ; herbivores ; pest population ; natural enemy ; cereal–legume mixture ; common vetch ; cultivar ; soil quality ; cereal-legume mixture ; organic farming ; conventional farming ; leaf greenness index ; seed yield ; yield components ; n/a ; thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GP Research and information: general
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    70th Year Anniversary of Carbon Nanotube Discovery—Focus on Real World Solutions (2024)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-04-09
    Description: This Special Issue reprint highlights seventy years since the discovery of carbon nanotubes (CNTs) in 1952 by Russian scientists LV Radushkevich and VM Lukyanovich in what was then the Union of Soviet Socialist Republics or the USSR. It also reflects the popularization by the well-known Japanese scientist S Iijima, since 1991, of carbon nanostructures, including CNTs, towards nanotechnology as a forever impactful and inspiring field. For researchers, academics, and teachers of all levels, from novice to expert to guru, the articles contained within this Special Issue are themed around sustainability from nanotechnology, pertaining to diameter measurement, rotor system molecular simulation, ultra-high tensile strength, energy, filtration via membrane distillation, environmental remediation using adsorption, ionic liquids as curing agents, biosensors and bioinspired sensors, and electrical/mechanical properties of polymer nanocomposites. The CNT is a legacy 1D nanomaterial, only after which was 2D graphene able to emerge. This is a global and mixed-country authorship Special Issue, with this reprint containing articles from Canada, Saudi Arabia, China, Russia, Spain, India, Japan, the United Arab Emirates (UAE), the USA, Germany, Turkiye, and Malaysia. The Guest Editor is from Singapore and began publishing critical work on the CNT-polymer interface towards the mechanical properties of the nanocomposite up to 20 years ago.
    Keywords: CNTs ; MWCNTs ; SWCNTs ; polymer composite ; mechanical performance ; flexible capacitive sensors ; bioinspired spinosum ; CNT/PDMS nanocomposite ; tires ; transmission system ; carbon nanotube (CNT) ; hydroxyl groups ; response speed ; energy dissipation ; carbon nanotubes ; carbon nanotube fibers ; tensile strength ; defect control ; controlled preparation ; dielectric polymer composites ; permittivity ; polymer nanocomposite ; electrical conductivity ; mixing ; polymer blends ; electromagnetic interference shielding ; carbon nanotube ; filler migration ; polyethylene ; lead ; arsenic ; adsorption ; poly(amidoamine) ; silver nanoparticles ; biosensor ; virus ; SARS-CoV-2 ; toxicity ; biocompatibility ; electrospinning ; electrospraying ; nanomaterials ; nanostructured membrane ; nanocomposites ; seawater desalination ; temperature polarization ; flux ; solar energy ; dye degradation ; surface plasmon resonance effect ; TiO2/rGO/Ag ; hybrid nanostructures ; phosphorus ; encapsulation ; lithium-ion batteries ; atomic force microscopy ; diameter ; nanometrology ; epoxy resin ; ionic liquid ; nanocomposite ; curing agent ; dispersing agent ; mechanical properties ; lap shear ; conductivity ; melt-mixing ; polymer composites ; SWCNT ; PMMA ; n/a ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
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    Celebrating 25 Years of World Wetlands Day (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2022-11-17
    Description: The purpose of this Special Issue is to celebrate 25 years of “World Wetlands Day”. There is no other ecosystem that has its very own Ramsar Convention or such a challenge impacting ecosystem sustainability. Papers for this Special Issue provide an overview of wetland status and function within different regions of the world. The papers in this Special Issue of Land consist of three review papers, ten research articles and one perspective paper. Edward Maltby’s review paper provides us with an overview of the paradigm shift of how we value and assess wetlands over time. Ballut-Dajud et al. provide us with a worldwide perspective on factors affecting wetland loss. Finally, Jan Vymazal provides us with a historical overview of the development of water quality treatment wetlands in Europe and North America. The research papers can be grouped into four groups: 1) use of remote sensing to analyze stability and dynamic factors affecting wetlands; 2) factors affecting the wetlands’ ability to store carbon; 3) assessment of wetlands effect on water quality; and 4) understanding historical use and value of wetlands, farmer’s attitudes about wetland management, and how we can value wetland ecosystem services. Finally, Bryzek et al. remind us that, as wetland researchers and managers, we should minimize damage to wetlands even through field monitoring work.
    Keywords: cyanobacteria ; phosphorus ; restoration ecology ; water quality ; wetland ; wetland soil ; microbial respiration ; CO2 efflux ; Everglades ; enzyme activity ; grazing ; created wetlands ; freshwater marshes ; carbon cycling ; wetlands ecosystems ; moral norms ; self-identity ; theory of planned behavior ; sustainability ; Poyang Lake ; ecosystem service value ; lakeshore zone ; Landsat ; remote sensing ; spatial–temporal changes ; human activities ; ghost forest ; forested wetland ; aboveground biomass ; soil carbon ; carbon dating ; constructed wetlands ; macrophytes ; pollution ; wastewater ; wetlands ; colonization ; nature-culture relationship ; perceptual typology ; coastal wetlands ; tidal flat reclamation ; stability ; impact ; Jiangsu coastal area ; anthropogenic activities ; climate change ; terrestrial ecosystems ; environmental impacts ; greenhouse gases ; cleaning ; efficacy ; ethics ; researcher impacts ; wetland decontamination ; wetland management history ; Ramsar convention ; wise use ; wetland assessment methods ; wetland valuation ; wetlands paradigm shift ; ecosystem approach ; wholescapes ; sustainable development ; World Charter for wetlands ; bic Book Industry Communication::G Reference, information & interdisciplinary subjects::GP Research & information: general ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics::KCN Environmental economics
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    Elemental Concentration and Pollution in Soil, Water, and Sediment (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2022-05-06
    Description: This book, entitled “Elemental Concentration and Pollution in Soil, Water, and Sediment”, presents an updated overview of the main trace elements in living organisms. This collection brings researchers from different fields together, including those from biogeochemistry and ecotoxicology in various environmental media, in order to provide a more comprehensive understanding of the environmental fate of trace elements in their biogeochemical cycles for different ecosystems.
    Keywords: marine sediments ; trace metals ; speciation ; contamination ; San Simon Bay ; soil remediation ; toxicity bioassays ; humic substances ; calcium carbonate ; iron oxides ; polyphenolic compounds ; heavy metals ; soil ; enrichment factor ; geoaccumulation index ; contamination factor ; pollution indices ; soil contamination ; geogenic and anthropogenic origin ; iron ore deposits ; tailing dumps ; seepage water ; water balance of the enterprise ; metals ; p-arsanilic acid ; adsorption ; natural fluorine-enriched soil ; natural sources ; chemical extraction resistance ; low washing efficiency ; lacustrine sediments ; geochemical mapping ; spatial distribution ; contamination assessment ; environmental risk assessments ; sediment quality guidelines ; pollution ; bottom sediments ; river ; acid mine drainage ; abandoned coal mine ; potentially toxic elements ; pollution level ; potential ecological risk ; sewage sludge ; calcareous soil ; extraction DTPA ; crop ; transfer ; long time ; engineered nanoparticles ; organic matter ; phosphorus ; nutrients ; volcanic soil ; agricultural land contamination ; sediment ; irrigation canal ; heavy metal ; copper ; cadmium ; Daphnia pulex ; ecotoxicology ; LC50 ; ecological risk assessment ; karst areas ; soil properties ; urban ecology ; trace metal pollution ; soil organisms ; diversity ; Western Siberia ; snow pollution ; trace metals and metalloids ; atmospheric depositions ; solubility ; sediments ; bioindicators ; geochemical background ; risk assessment code ; sequential extraction ; groundwater ; precipitation ; caustic calcined magnesia (CCM) ; permeable reactive barrier (PRB) ; natural water ; water quality ; Arctic region ; elemental composition ; springs ; QR code ; modern sedimentation processes ; mineralogy ; geochemistry ; authigenic minerals ; hydrogen sulfide contamination ; arid climate ; Caspian Sea ; n/a ; bic Book Industry Communication::G Reference, information & interdisciplinary subjects::GP Research & information: general ; bic Book Industry Communication::P Mathematics & science::PN Chemistry
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    Hardwood Reforestation and Restoration (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-05
    Description: Hardwood-dominated temperate forests (mostly in Eastern North America, Europe, North East Asia) provide valuable renewable timber and numerous ecosystem services. Many of these forests have been subjected to harvesting or conversion to agriculture, sometimes over centuries, that have greatly reduced their former extent and diversity. Natural regeneration following harvesting or during post-agricultural succession has often failed to restore these forests adequately. Past harvesting practices and the valuable timber of some species have led to a reduction in their abundance. The loss of apex predators has caused herbivore populations to increase and exert intense browsing pressure on hardwood regeneration, often preventing it. Particularly important are fruit, nut and acorn bearing species, because of their vital role in forest food webs and biodiversity. Restoring hardwood species to natural forests in which they were formerly more abundant will require a number of forest management actions (e.g., resistant hybrids, deer exclosures/protectors, enrichment planting, underplanting, etc.). Similarly, reforesting areas that were once natural forests will also require new silvicultural knowledge. Global warming trends will intensify the need for interventions to maintain the diversity and function of temperate hardwood forests, as well as for increase hardwood reforestation.
    Keywords: QH301-705.5 ; QH540-549.5 ; Q1-390 ; Fagaceae species ; soil disturbance ; non-timber forest products ; precision restoration ; protected landscape area ; tree selection ; cultural diversity ; Quercus rubra ; hardwood restoration ; enrichment planting ; sub-tropical hardwoods ; agroforestry ; herbicide effects ; biological diversity ; competition ; Juglans nigra L. ; understorey ; invasive plants ; wildfire ; forest restoration ; Quercus macrocarpa ; riparian forest restoration ; vegetation management ; assisted migration ; sugar maple ; deer browsing ; species composition ; tolerance ; phosphorus ; growth efficiency index ; floristic quality index ; shelterwood ; Carya cordiformis (Wangenh.) K. Koch ; monitoring ; indicators ; seed predation ; Bioclimatic niche ; non-parametric correlation ; unmanaged forest ; Native Americans ; abandoned agricultural field ; native mixed forests ; tree vigor ; forest diversity ; predation ; weed control ; nitrate ; facilitation ; inventory ; hardwoods ; Mexican tree species ; yellow birch ; tree plantation ; seedling establishment ; deer abundance ; avian guilds ; Pinus strobus L. ; Central Hardwood Forest region ; Pinus strobus ; Durango ; MaxEnt ; Juglans nigra ; oak regeneration ; forest regeneration ; Quercus rubra L. ; deer herbivory ; ecosystem services ; tree shelter ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences
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    Innovative Conservation Cropping Systems and Practices (2023)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2023-04-05
    Description: This Special Issue “Innovative Conservation Cropping Systems and Practices” is focused on the development and assessment of innovative conservation cropping systems and practices in determining system productivity and enhancing crop production and soil quality. It covers applied engineering for achieving a sustainable balance between productivity, environmental, and profitability factors, presenting a collection of research articles that cover a broad range of cropping systems and practices from the farmland ecosystem.
    Keywords: straw management ; potassium fertilizer ; rice–oilseed rape rotation ; yield ; bacterial community ; fungal community ; rice ; intercropping ; water mimosa ; pest and disease ; microclimate ; grain quality ; maize ; root system architecture ; nitrogen rates ; cultivars ; phytoremediation ; secondary salinization ; salt tolerance ; microbial diversity ; nutrient accumulation ; conservation tillage ; metabarcoding ; smash ridging ; soil chemical properties ; soil microbial diversity ; sugarcane ; coastal salt-affected soil ; one-crop-per-annum cropping ; fallow mulching ; salt accumulation ; crop growing ; nitrogen rate ; nitrogen ratio ; regenerative ability ; reduced tillage ; no tillage ; side deep fertilizing of machine-transplanted rice ; root function ; photosynthesis ; ammonia-oxidizing bacteria ; integrated fertilization regime ; N2O emission factor ; N2O flux ; purple caitai fields ; C:N ratio ; net ecosystem exchange ; soil microbial carbon ; soil microbial nitrogen ; rice production ; CH4 ; N2O ; water productivity ; global warming ; interspecific competition ; land equivalent ratio ; planting pattern ; root length density ; root morphological characteristics ; biochar ; maize–cabbage system ; crop quality ; N utilization efficiency ; soil inorganic N ; straw returning ; soil microbes ; carbon source utilization ; grey relational analysis ; path analysis ; ratoon rice ; nitrogen balance ; reactive nitrogen losses ; nitrogen surplus ; nitrogen-use efficiency ; no-till ; straw return ; soil organic carbon fractions ; soil aggregate ; bacterial diversity ; rice–crayfish coculture ; different rice varieties ; controlled-release fertilizer ; dry matter accumulation ; rice growth characteristics parameters ; apple-ryegrass intercropping ; photosynthetic characteristics ; soil salinity ; soil moisture content ; fruit quality ; lake sediment ; phosphorus ; Chinese cabbage ; phoD gene ; high-throughput sequencing ; bic Book Industry Communication::G Reference, information & interdisciplinary subjects::GP Research & information: general ; bic Book Industry Communication::P Mathematics & science::PS Biology, life sciences ; bic Book Industry Communication::T Technology, engineering, agriculture
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    Wastewater Treatment, Valorization and Reuse (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-03-27
    Description: This book deals with the latest developments regarding urban and industrial wastewaters’ adapted treatment with various technologies. It focuses, through valuable publications, on the shifting of the wastewater management paradigm from “treatment and disposal” to “the 4Rs principle: Reduce, Recycle, Reuse, and Recover”. The adapted wastewater treatment step will allow (i) the disposal of supplementary water amounts that could be safely reused in order to tackle the water-scarcity problem, and (ii) the preservation of the environment against pollution. Finally, this book will contribute to the achievement of the United Nations Sustainable Development Goals and other international related initiatives.
    Keywords: OMWW ; drying ; water recovery ; water characterization ; sustainable development ; alternating current ; coupling ; hybrid material ; biosorption ; wastewater reuse ; protein adsorption ; neutral solute ; ultrafiltration ; selectivity modelling ; pore size distribution ; raw poultry manure ; pyrolysis ; biochar ; characterization ; leaching ; phosphorus ; potassium ; grey water ; SBR ; fouling ; zeta potential ; norovirus ; water reuse ; water quality ; mineral processing ; wastewater treatment ; flotation ; electrocoagulation (EC) ; chemical oxygen demand (COD) ; polyhydroxyalkanoates ; PHA ; PHBV ; mixed microbial culture ; green extraction ; dimethyl carbonate ; purification ; 1-butanol ; wastewater valorization ; reclaimed water ; circular economy ; anaerobic digestion ; biogas ; reuse ; water pricing ; water depletion ; industrial sector ; lignite ; heavy metals ; adsorption ; batch ; isotherm ; mechanism ; n/a ; thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GP Research and information: general
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    Modeling and Practice of Erosion and Sediment Transport under Change (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-04-11
    Description: Climate and anthropogenic changes impact the conditions of erosion and sediment transport in rivers. Rainfall variability and, in many places, the increase of rainfall intensity have a direct impact on rainfall erosivity. Increasing changes in demography have led to the acceleration of land cover changes in natural areas, as well as in cultivated areas, and, sometimes, in degraded areas and desertified landscapes. These anthropogenized landscapes are more sensitive to erosion. On the other hand, the increase in the number of dams in watersheds traps a great portion of sediment fluxes, which do not reach the sea in the same amount, nor at the same quality, with consequences on coastal geomorphodynamics. This book is dedicated to studies on sediment fluxes from continental areas to coastal areas, as well as observation, modeling, and impact analysis at different scales from watershed slopes to the outputs of large river basins. This book is concentrated on a number of keywords: “erosion” and “sediment transport”, “model” and “practice”, and “change”. The keywords are briefly discussed with respect to the relevant literature. The contributions in this book address observations and models based on laboratory and field data, allowing researchers to make use of such resources in practice under changing conditions.
    Keywords: TA1-2040 ; T1-995 ; proglacial channels ; watershed ; practice ; modeling ; reservoirs ; degradation ; rill development ; Mediterranean Maghreb Basin ; urban drainage system ; fluvial erosion ; Wadi Mina ; Algeria ; sewer systems ; climate change ; phosphorus ; complex morphodynamics ; incipient deposition ; riverbed ; limiting tractive force ; ruptures ; runoff ; flooding ; soil loss ; suspended sediment ; sedimentation ; sediment ; transfer ; erosion ; specific degradation ; soil erosion ; Xihe River Basin ; water fluxes ; sediment fluxes ; environmental change ; field measurements ; dynamical downscaling ; mixed-size bed material ; two-phase flow ; agriculture ; sloping flume experiments ; mitigation measures ; bed load transport ; shear stress ; flow discharge ; GSD ; shear Reynolds number ; Anthropocene ; human activities ; deposition ; sediment delivery ; soil slurry ; SMBA Dam ; bedload transport ; aggradation ; Czech Republic ; sediment transport ; self-cleansing ; erosion topography ; CCHE1D ; sediment retention ; SWAT model ; migration ; water quality modelling ; hillside reservoirs ; erosion modelling ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Assessment and Governance of Sustainable Soil Management (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-04-05
    Description: The role of soils for achieving the Sustainable Development Goals is multifarious. Soils are the essential basis for food and biomass provision in support of food security (SDG 2) and energy security (SDG 7). Soil carbon sequestration is paramount for climate action (SDG 13). Soil-mediated water purification and retention, nutrient and matter cycling, and soils habitat functions are essential for maintaining ecosystem services and biodiversity (SDG 15). Healthy soils perform well in all these functions simultaneously. However, the globally increasing demand for food, fiber, and bio-based products poses massive challenges to soil health. Minimizing trade-offs between biomass production and soil health requires systemic approaches to assessment and governance of sustainable soil management in agriculture and food systems. It provides interdisciplinary insights into key questions: What are the impacts of agricultural management practices on sustainability targets in specific geophysical and socio-economic contexts? What are the opportunities and risks of future trends such as climate change, digitalization, and emerging technologies for soil management and soil health? How can institutions and governance instruments be improved to enable decision makers to take action on sustainable soil management? The book was initiated in the frame of the National German research program ‘BonaRes—Soil as a sustainable resource for the bioeconomy’, and it is meant to trigger interdisciplinary thinking.
    Keywords: QH301-705.5 ; Q1-390 ; S1-972 ; land management ; risk assessment ; carob ; N leaching ; Syria ; earthworms ; subsoil ; desertification ; alfalfa ; yield potential ; tenant ; dynamic programming ; soil policy ; monitoring ; resource scarcity ; soil management ; crop–livestock interactions ; German Constitutional Law ; gross income ; Germany ; spatially explicit ; creation ethics ; bayesian network ; agricultural practices ; conventional farming ; soil ; soil degradation ; combination of modern and indigenous knowledge ; Costa Rica ; yield ; soils ; rent price ; fertilization ; sustainability assessment ; societal acceptance ; property rights ; justifying soil protection ; subsoil loosening ; behavioural studies ; governance ; agricultural policy ; water infiltration ; sealing ; soil protection ; soil framework directive ; rent proportion ; soil remediation ; so-called organic fertilizer ; soil compaction ; nutrient composition ; phosphorus ; resource use efficiency ; soil pressures ; soil threats ; Europe ; soil functions ; literature review ; sustainability ; conservation agriculture ; institutions ; environmental zones ; soil health ; landowner ; soil governance ; zero tillage ; coffee by-products ; production ; arid oasis ; Laudato si’ ; soil food web ; land ; compaction ; farmer motivations ; agricultural innovation ; crop rotation modelling ; Driver-Pressure-State-Impact-Response sustainability framework ; contamination ; sustainable soil management ; agricultural yields ; Nicaragua ; sustainable agriculture ; ecosystem services ; legal comparison ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences
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    Herbaceous Field Crops Cultivation (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-03-28
    Description: Herbaceous field crops include several hundred plant species worldly widespread for different end-uses, from food to no-food applications. Among them are included cereals, grain legumes, sugar beet, potato, cotton, tobacco, sunflower, safflower, rape, flax, soybean, alfalfa, clover spp. and other fodder crops, but only 15–20 species play a relevant role for the worldly global economy. Nowadays, to meet the food demand of the ever-increasing world population in a scenario of decreased arable lands, the development of holistic agricultural management approaches to boost contemporaneously yield and quality of herbaceous field crops is essential. Accordingly, this book represents an up-to-date collection of the current understanding of the impact of several agricultural management factors (i.e., genetic selection, planting density and arrangement, fertilization, irrigation, weed control and harvest time) on the yield and qualitative performances of 11 field crops (wheat, cardoon, potato, clary sage, basil, sugarcane, canola, cotton, tomato, lettuce and hemp). On the whole, the topics covered in this book will ensure students and academic readers, such as plant physiologists, environmental scientists, biotechnologists, botanists, soil chemists and agronomists, to get the information about the recent research advances on the eco-sustainable management cultivation of herbaceous field crops, with a particular focus on varietal development, soil nutrient and water management, weed control, etc.
    Keywords: planting density ; fertilization ; the central composite design ; fiber yield ; analog optimization ; potato ; nitrogen fertilization ; environmental sustainability ; cost-effective ; nitrogen use efficiency ; tuber yield ; EONFR ; growth ; specific leaf nitrogen ; critical nitrogen uptake ; cotton ; dry matter yield ; root growth ; root physiology ; water productivity ; nitrogen productivity ; drip irrigation quota ; lint yield ; biomass ; leaf chlorophyll fluorescence ; leaf gas exchange ; leaf structure ; drought tolerance ; dry weight yield ; essential oil content ; leaf area index ; Ocimum basilicum ; potassium ; fertilizer ; biomass accumulation ; fiber quality ; organic farming system ; yield ; pH ; soluble solid content ; Bostwick viscosity ; phosphorus sensitivity ; phosphorus ; reproductive organ biomass ; nutrients accumulation ; plant density ; nitrogen fertilization rate ; photosynthesis rate ; SPAD readings ; nitrogen efficiency indices ; tuber nutritional composition ; cereal crops ; plant water extracts ; bioherbicides ; weed management ; allelopathy ; dual purpose canola ; nitrogen fertilizer ; oil content ; grazing ; sustainable agriculture ; integrated weed management ; yield losses ; preventive weed control ; mechanical weed control ; physical weed control ; biological weed control ; herbicides ; hybrids ; wheat ; weeds ; competition ; genetic gain ; genomic selection ; quantitative genetics ; sugarcane breeding ; pit plantation ; planting patterns ; ratoon crop ; sowing techniques ; sugarcane yield ; quality ; seasonal variation ; fatty acids ; free sugars ; chemical composition ; Cynara cardunculus L. ; cardoon ; organic acids ; clary sage ; essential oil ; aromatic plant species ; biometric and agronomic characteristics ; arbuscular mycorrhizal fungi ; organic farming ; calcareous soils ; crop physiology ; sustainability ; diatomaceous earth ; monosilicic acid ; Si application method ; soil water conditions ; wheat cultivar ; tocopherols ; lipidic fraction ; companion plants ; N-fertilization ; partial land equivalent ratio (PLER) ; weed control ; grain quality ; productivity ; n/a ; thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GP Research and information: general ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes
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    Recent Advances in Hydro- and Biohydrometallurgy (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-04-11
    Description: This Special Issue of Minerals presents recent, select studies that highlight advances in the fields of hydro- and biohydrometallurgy. It aims to attract the interest of readers and especially of young scientists and students in this fascinating scientific discipline.
    Keywords: TA1-2040 ; T1-995 ; n/a ; counter-current leaching ; metal extraction ; slag ; low-grade saprolitic laterite ; agglomeration ; bioleaching ; white metal ; precipitation ; iodide ; seawater ; reducing agent ; chloride ; chalcopyrite ; pyrite–arsenopyrite galvanic pair ; frontier orbital methods ; acid media ; bottom ash ; phosphorus ; manganese nodules ; waste reuse ; galvanic effect ; gold diiodide ; municipal solid waste incineration ; jarosite ; column leaching ; secondary mining ; iodide-oxidizing bacteria ; leaching ; primary sulfide copper ; heap leaching ; electrochemical ; optimization of parameters ; chloride ion ; reductive mineral dissolution ; tailings ; curing ; acid leaching ; secondary products ; uranium ; ferric ion ; Acidithiobacillus ; limonitic laterites ; iron reduction ; fluorapatite ; nitrate ; gold ; phosphate mineral ; purification ; iodine ; nickel ; sodium sulfite ; pregnant leach solution ; copper sulfide ; sulphuric acid ; laterites ; REE ; pretreatment ; triiodide ; laterite ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Plateau Lake Water Quality and Eutrophication: Status and Challenges (2023)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2023-02-02
    Description: The continuous and widespread deterioration of lake water quality and eutrophication is not only a local problem, but also a global phenomenon. It is not only destroying, or at least limiting, the valuable water resources for daily life, but threatening the water security of sustainable social development. More importantly, along with the rapid accumulation of the alga, including novel hypertoxic viruses and new toxic chemicals, as well as other organic compounds, these stressors threaten aquatic life, biodiversity and endanger our health.This Special Issue highlights and discusses major threats to Plateau Lakes water quality, and provides an update on both lake current status, as well as future challenges. Lake problems, such as pollution and eutrophication, require that we quantify how serious the situation is, identify the probable causes, and recommend how to control the pollution in order to restore and protect water quality. More importantly, this Special Issue stresses the need to manage the lakes and the watershed under a unified approach.
    Keywords: external loading ; internal loading ; water quality ; tributary ; Lake Xingyun ; Lake Chenghai ; Yunnan ; water quality parameters ; seasonality ; spatial heterogeneity ; La-modified material ; macrophyte ; sediments ; phosphorus ; eutrophication ; particulate organic matter (POM) ; carbon and nitrogen stable isotopes ; source tracing ; ecosystem degradation ; Caohai Lake ; middle reach of the Jinsha River ; cascade hydropower development ; regression discontinuity analysis ; Lake Lugu ; thermal stratification ; seasonal changes ; Lake Qilu ; seasonal variation ; water temperature ; dissolved oxygen ; chlorophyll-a ; pH ; turbidity ; plateau lake ; nutrient limitation transformation ; nutrient threshold ; alkaline lake ; phytoplankton blooms ; Lake Yangzong ; temporal and spatial variations ; cyanophyte relative quantity index ; nutrient reduction ; n/a ; Lake Yilong ; spatial-temporal variations ; anthropogenic activities ; Lake Erhai ; temperature ; Chl-a ; nutrient elements ; heavy metal elements ; spatiotemporal characteristics ; entropy method-fuzzy evaluation method ; principal component analysis ; spatial variation ; temporal variation ; bic Book Industry Communication::R Earth sciences, geography, environment, planning
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    Fungi and Fungal Metabolites for the Improvement of Human and Animal Nutrition and Health (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-04-09
    Description: The purpose of this book was not to provide a comprehensive overview of the vast arena of how fungi and fungal metabolites are able to improve human and animal nutrition and health; rather, we, as Guest Editors, wished to encourage authors working in this field to publish their most recent work in this rapidly growing journal in order for the large readership to appreciate the full potential of wonderful and beneficial fungi. Thus, this Special Issue welcomed scientific contributions on applications of fungi and fungal metabolites, such as bioactive fatty acids, pigments, polysaccharides, alkaloids, terpenoids, etc., with great potential in human and animal nutrition and health.
    Keywords: fungal pigment ; natural dye ; spalting ; Scytalidium cuboideum ; dramada ; sustainable clothing ; selenium ; biofortification ; transporters ; mycorrhizal fungi ; plant growth-promoting rhizobacteria (PGPRs) ; fungal pigments ; textile dyeing ; toxicity testing ; biotechnological approaches ; challenges ; limits ; Saccharomyces boulardii ; Saccharomyces cerevisiae ; probiotics ; gastrointestinal tract ; Alginate ; β-glucan ; oligosaccharides ; elicitation ; Sargassum species ; Sparassis latifolia ; polyphenol ; antioxidant ; agave mezcalero bagasse ; apple bagasse ; solid-state fermentation ; secondary metabolites ; Pleurotus ostreatus ; Endophytic fungi ; Hyptis dilatata ; Pestalotiopsis mangiferae ; Pestalotiopsis microspora ; chemical elicitors ; antibacterial activity ; LC–ESI–Q–TOF–MS ; yeast ; biological control ; postharvest decay ; fruit ; mycorrhizae ; elevated CO2 ; Thymus vulgare ; growth ; photosynthesis ; metabolites ; biological activity ; Candida albicans ; non-albicans Candida species ; Candida auris ; aromatic alcohols ; fungi ; metabolomics ; NTCD ; additives ; functional foods ; nutraceuticals ; sustainability ; healthy aging ; Mortierella alpina ; animal fat by-product ; arachidonic acid ; ATR-FTIR spectroscopy ; Mucor circinelloides ; high-throughput screening ; metal ions ; phosphorus ; lipids ; biofuel ; FTIR spectroscopy ; bioremediation ; co-production ; natural colorants ; filamentous fungi ; stirred-tank bioreactor ; biodegradable films ; food package ; bioactive compounds ; FIP ; human health ; immunomodulation ; induced apoptosis ; lectin ; medicinal mushrooms ; polysaccharide ; terpenes and terpenoids ; melanin ; carotenoids ; polyketides ; azaphilones ; antitumor ; medical roles ; sphinganine-analog mycotoxins ; fumonisins ; AAL-toxin ; chemical structure ; toxicity ; genetics and evolution ; biosynthesis ; livestock ; ewes ; energy ; cytokines ; yeasts ; liquid swine diets ; MALDI-TOF ; biochemical identification ; growth temperature Ancom Gas Production System ; Candida krusei ; Candida lambica ; M. purpureus ; red yeast rice ; cholesterol reduction ; probiotic potential ; natural colorant ; extraction ability ; marine fungi ; Talaromyces albobiverticillius ; aqueous two-phases system extraction ; ionic liquids ; feed additive ; probiotic ; Sporidiobolus ruineniae ; tannase ; micro-fungi ; macro-fungi ; Ganoderma ; kombucha ; anticancer ; carotenoid ; medicinal mushroom ; mycobiome ; antimicrobial ; antifungal ; bioconversion ; cheese ; dairy ; Sclerotinia ; secondary metabolite ; endophytic fungi ; uncommon secondary metabolites ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
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    Analysis of Crop Genetic and Germplasm Diversity (2023)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2023-09-11
    Keywords: Laurus nobilis ; medicinal plant ; mobile genomic elements ; germplasm characterization ; Mediterranean region ; chloroplast ; Ipomoea batatas ; simple sequence repeat ; sweet potato ; plant germplasm ; landrace rice ; fat-soluble nutraceuticals ; β-sitosterol ; genetic variability ; cluster analysis ; Solanum melongena ; germplasm ; Greece ; islands ; mainland ; phenotyping ; genotyping ; mineral composition ; landraces ; genetic diversity ; genetic structure ; Panax ginseng ; Triticum turgidum ; HMW glutenins ; LMW glutenins ; gluten quality ; non-allelic interactions ; combined analysis ; evolution ; genetic resources ; Zea mays ; Blumeria graminis ; disomic addition line ; molecular cytogenetics ; wheat ; Psathyrostachys huashanica ; natural variation ; maize ; root length ; domestication selection ; ZmMADS60 gene ; genetic basis ; GWAS ; eating and cooking qualities ; rice ; genetic variation ; eggplant ; cropping condition ; yield ; agro-morphological characterization ; chili pepper ; gene bank ; molecular markers ; morphological descriptor ; DArTseq markers ; GBS ; Triticum aestivum ; starch ; SNP ; InDel ; CAPS ; intron-loss ; NGS ; phosphorus use efficiency ; phosphorus ; proteomics ; grain hardness ; PIN ; kernel texture ; triticum ; SKCS ; Cucumis sativum ; downy mildew ; genetics ; inheritance ; oomycetes ; resistance ; rice genotypes ; blast resistant genotype ; genotypic coefficient of variation (GCV) ; phenotypic coefficient of variation (PCV) ; heritability values ; DArT SNP markers ; early maturity ; heat and drought tolerance ; salt stress ; nitrogen metabolism ; oxidative stress response ; G6PDH ; GDH ; GS/GOGAT ; Triticum aestivum L. ; γ-gliadins ; Gli-B1 ; polymorphism ; PCR analysis ; ginseng ; genetic composition ; SSR ; fonio ; fonio millet ; white fonio ; Digitaria exilis ; agro morphological descriptors ; phenotypic diversity ; neglected and underutilized species (NUS) ; genetic improvement ; catechin ; phytochemicals ; targeted-oriented core collection ; tea germplasm ; agronomic performance ; correlation analysis ; malawi ; pigeonpea ; yield stability ; bermudagrass ; forage breeding ; genetic parameters ; genotype by harvest interaction ; Tifton 85 ; accessions ; descriptors ; anthracnose ; Colletotrichum lentis ; disease screening ; lentil ; plant resistance ; tall wild pea ; Pisum sativum subsp. elatius ; neoplasm ; pea weevil ; Bruchus pisorum ; expressivity ; Africa ; cowpea ; microsatellites ; Aegilops ; triticale ; leaf rust ; stripe rust ; yellow rust ; Puccinia ; drought ; Phaseolus vulgaris L. ; plant breeding ; rhizobia ; stress ; n/a ; bic Book Industry Communication::G Reference, information & interdisciplinary subjects::GP Research & information: general ; bic Book Industry Communication::P Mathematics & science::PS Biology, life sciences
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    Monitoring, Modelling and Management of Water Quality (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-03-28
    Description: Different types of pressures, such as nutrients, micropollutants, microbes, nanoparticles, microplastics, or antibiotic-resistant genes, endanger the quality of water bodies. Evidence-based pollution control needs to be built on the three basic elements of water governance: Monitoring, modeling, and management. Monitoring sets the empirical basis by providing space- and time-dependent information on substance concentrations and loads, as well as driving boundary conditions for assessing water quality trends, water quality statuses, and providing necessary information for the calibration and validation of models. Modeling needs proper system understanding and helps to derive information for times and locations where no monitoring is done or possible. Possible applications are risk assessments for exceedance of quality standards, assessment of regionalized relevance of sources and pathways of pollution, effectiveness of measures, bundles of measures or policies, and assessment of future developments as scenarios or forecasts. Management relies on this information and translates it in a socioeconomic context into specific plans for implementation. Evaluation of success of management plans again includes well-defined monitoring strategies. This book provides an important overview in this context.
    Keywords: diffuse pollution ; field mapping ; storm drains ; Bayesian statistics ; distributed modelling ; PhosFate ; water quality ; analysis method ; chromaticity measurement ; surface fitting ; concentration of dissolved matter ; Copernicus Programme ; ACOLITE ; flooding ; quasi-real time monitoring ; inundation mapping ; suspended matter ; Spain ; cyanobacteria ; Microcystis aeruginosa ; water ; monitoring ; spectrophotometry ; derivative absorbance ; model evaluation ; nitrogen ; nutrient retention ; phosphorus ; sediment ; constructed wetland ; water resources management ; eutrophication ; unmanned surface vehicle ; water monitoring ; ensemble learning ; dynamic power management ; observational process ontology ; water quality monitoring ; water pollution alert ; semantic discovery ; water quality status ; sources and pathways ; land cover ; digital elevation model ; urban river ; ArcGIS ; modeling ; CSO ; urban drainage ; sewer system ; trace pollutants ; urban runoff ; concentration duration frequency curve ; MONERIS ; diffuse nutrient emission ; empirical modeling ; river basin management plan of Hungary ; effectiveness of measures ; scenarios and forecasts ; socioeconomic context ; sources and pathways of water pollution ; system understanding ; water governance ; water quality statuses and trends ; water pollution control ; thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GP Research and information: general ; thema EDItEUR::K Economics, Finance, Business and Management::KC Economics::KCV Economics of specific sectors::KCVG Environmental economics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TQ Environmental science, engineering and technology::TQK Pollution control
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    Advanced Photocatalytic Materials for Environmental and Energy Applications (2024)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-01-08
    Description: With the development of modern society, environmental pollution and energy shortages have become the focus of attention worldwide. Most of the global energy supplies are generated from fossil fuel, which gives rise to environmental pollution and climate change. Photocatalysis technology, which can directly convert solar energy into high value-added fuel and chemical materials or degrade a wide range of organic pollutants into easily degradable intermediates or less toxic small molecular substances, is regarded as one of the most important ways to solve the global energy shortage and environmental pollution problem. This Special Issue focuses on advanced photocatalytic materials, including but not limited to photocatalytic materials for the treatment of indoor air, photocatalytic bacterial inactivation, photocatalytic hydrogen evolution, photocatalytic oxygen evolution, photocatalytic CO2 reduction, photocatalytic hazardous pollutant removal, the photothermal decomposition of pollutants, photoelectrochemical water splitting, etc. This Special Issue provides a platform for scientists to present their original research on “Advanced Photocatalytic Materials for Environmental and Energy Applications”.
    Keywords: PbBiO2I microspheres ; CQDs ; ionic liquid ; charge separation ; interface ; polycrystalline silicon ; solar cells ; low-high-low ; phosphorus diffusion ; semiconductor ; photocatalysis ; indoor air treatment ; volatile organic compounds ; microorganism ; photocatalyst ; type-II heterojunction ; carrier separation ; photodegradation ; phase engineering ; water splitting ; CO2 reduction ; pollutant degradation ; MoS2 ; SnS2 ; composite catalyst ; visible light degradation ; thermo-photocatalysis ; nickel foam ; Ni-doped TiO2 ; acetaldehyde decomposition ; zinc oxide ; Langmuir–Hinshelwood–Hougen–Watson model ; methylene blue ; titanium dioxide ; anodization ; self-doping ; cocatalyst ; Mo2C ; phosphorus ; doped ; g-C3N4 ; photocatalytic ; mixture of pollutants ; coupling system ; plasma ; synergetic effect ; mineralization ; n/a ; bic Book Industry Communication::G Reference, information & interdisciplinary subjects::GP Research & information: general ; bic Book Industry Communication::P Mathematics & science::PN Chemistry
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    Research on Characterization and Processing of Table Olives (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-04-09
    Description: Written by experts in the field of table olives, this book is a source of recent research advances on the characterization and processing of table olives. Research papers are provided relating to the characterization of their composition of volatiles and the sensory profile; mineral composition and bioavailability; changes in bioactive components (chlorophylls) by processing; and new strategies to reduce sodium and additives for stabilizing the organoleptic properties and avoiding defects in table olives. Other research papers are included in relation to microbiological and chemical changes in table olives during spontaneous or controlled fermentation employing different cultivars, and the optimized use of starter cultures for the improvement of the different fermentative processes. In addition, this book includes an overview of the main technologies used for olive fermentation, including the role of lactic acid bacteria and yeasts characterizing this process, and of the processing and storage effects on the nutritional and sensory properties of table olives.
    Keywords: table olives ; starter cultures ; GC-MC analysis ; volatile composition ; bitterness ; consumer willingness to pay ; descriptive sensory analysis ; green-olive flavor ; “Manzanilla” cultivar ; pit hardening ; regulated deficit irrigation ; panel performance ; panelist ; black ripe table olives ; sensory descriptors ; sensory profile ; fermentation ; microbiological changes ; organoleptic ; physicochemical ; Clostridium ; logistic regression ; acid-adapted strains ; predictive models ; fermented vegetables ; undefined biodiverse starters ; autochtonous cultures ; lactic acid bacteria ; Lactobacillus pentosus ; Tonda di Cagliari ; table olive ; phenolic compounds ; oleuropein ; LAB ; yeasts ; fermented food ; probiotic table olives ; non-dairy probiotics ; sodium ; potassium ; calcium ; magnesium ; iron ; phosphorus ; darkened by oxidation olives ; Miller’s protocol ; Crews’ protocol ; post-digest re-extraction ; minerals ; sea salt ; PGI ; iodized salt ; functional food ; composition ; nutritional properties ; polyphenols ; sensory analysis ; chlorophyll ; pigments ; allomerization ; alkaline treatment ; phytyl-chlorin ; phytyl-rhodin ; Bella di Cerignola ; brines ; microbiological quality ; user-friendly spreadsheet ; producers ; bioaccessibility ; mineral nutrients ; pigment composition ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
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    Ecological and Health Risk of Soils, Sediments, and Water Contamination (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-03-27
    Description: The papers in this SI present valuable results in the topics of soils, sediments, and water contamination according to the consideration of ecological and health risk. They also point out open questions and possible avenues for future research. Biochar application can benefit both soil conservation and contamination, but further research should be conducted to investigate whether these positive effects can be extended to the field scale. Similar to biochar, scale-up design will be helpful for thin-layer capping in in situ sediments using mixed active amendments. Both physiochemical analysis and bioassays mutually supported the evaluation results of river water quality. However, we need better approaches and policies for management to prevent further contamination from the discharge of untreated industrial and domestic waste into this aquatic ecosystem. The use of microorganisms to eliminate antibiotics is a promising strategy, but future work should verify the biodegradation ability of antibiotic-degrading bacteria in wastewater treatment plants.
    Keywords: heavy metal ; pollution ; antioxidant ; enzyme ; biomarkers ; ecological risk ; bioaccessibility ; cadmium ; chemical form ; husk biochar ; risk assessment ; active capping ; toxic metal ; sediment ; remediation ; multiple materials ; mercury ; methylmercury ; salinity ; biochar ; organic carbon ; nutrients ; leaching ; nitrogen ; phosphorus ; potassium ; sludge ; antibiotics ; biodegradation ; bioassays ; gold mining ; health risk ; microbiological indicators ; mutagenicity ; toxicity ; green and sustainable remediation ; SDGs ; thin-layer capping ; thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GP Research and information: general
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    Human Milk and Lactation (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-04-05
    Description: Human milk is uniquely tailored to meet infants’ specific nutritional requirements. However, it is more than just “milk”. This dynamic and bioactive fluid allows mother–infant signalling over lactation, guiding the infant in the developmental and physiological processes. It exerts protection and life-long biological effects, playing a crucial role in promoting healthy growth and optimal cognitive development. The latest scientific advances have provided insight into different components of human milk and their dynamic changes over time. However, the complexity of human milk composition and the synergistic mechanisms responsible for its beneficial health effects have not yet been unravelled. Filling this knowledge gap will shed light on the biology of the developing infant and will contribute to the optimization of infant feeding, particularly that of the most vulnerable infants. Greater understanding of human milk will also help in elucidating the best strategies for its storage and handling. The increasing knowledge on human milk’s bioactive compounds together with the rapidly-advancing technological achievements will greatly enhance their use as prophylactic or therapeutic agents. The current Special Issue aims to welcome original works and literature reviews further exploring the complexity of human milk composition, the mechanisms underlying the beneficial effects associated with breastfeeding, and the factors and determinants involved in lactation, including its promotion and support.
    Keywords: QH301-705.5 ; Q1-390 ; TX341-641 ; high pressure processing ; n/a ; lipids ; supplementation ; protective factors ; infant ; carbohydrate ; mothers ; antioxidant capacity ; protein ; fat ; cytokines ; bioactive factors ; late preterm ; zinc ; infants ; docosahexaenoic acid (DHA) ; pregnancy ; eicosapentaenoic acid (EPA) ; Lipidomics ; magnesium ; omega-3 fatty acids ; vitamin D deficiency ; flow injection analysis ; human milk benefits ; multiple source method ; 3?-sialyllactose (3?SL) ; milk banking ; milk group ; pasteurization ; video instruction ; Milk Fat Globule Membrane ; bile salt stimulated lipase ; breastfeeding difficulties ; breastfeeding support ; prematurity ; carotenoids ; hormones ; phosphocholine ; amino acids ; targeted metabolomics ; high-performance liquid chromatography (HPLC) ; choline ; selenium ; ?-linolenic acid ; arachidonic acid (ARA) ; docosahexaenoic acid ; human milk fortification ; protease inhibitors ; celiac disease ; copper ; term ; adipokines ; iodine ; mammary gland ; nutritional status ; food frequency questionnaire ; neonate ; early breastfeeding cessation ; prospective study ; breastfeeding ; mothers’ own milk ; disialyllacto-N-tetraose (DSLNT) ; country ; lactating women ; undernourishment ; proteases ; preterm ; expressing ; dietary assessment ; retinol ; body composition ; duration of lactation ; passive immunization ; 2?-fucosyllactose (2?FL) ; phosphorus ; clinical trial ; growth factors ; infant formula ; digestive tract ; human milk oligosaccharides (HMO) ; sodium ; nutrition ; eicosapentaenoic acid ; lipid metabolites ; lactation ; nervonic acid ; ?-tocopherol ; macronutrients ; glycoprotein ; term infant ; term infants ; maternal diet ; promotion of breastfeeding ; potassium ; antioxidants ; maternal immunoglobulins ; Human Milk ; human milk ; Phospholipids ; flu vaccine ; lactational stage ; lactose ; storage ; dietary intake ; Preterm infant ; immune-active proteins ; colostrum ; human milk fat ; inadequate intake ; milk therapy ; endogenous peptide ; calcium ; fatty acids ; breast milk ; pumping ; secretor ; LC-MS ; n-9 fatty acid ; Lewis ; donor human milk ; antenatal ; online ; iron ; growth ; donor milk ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences
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    Novel Research about Biomechanics and Biomaterials Used in Hip, Knee and Related Joints (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-03-30
    Description: Joint replacement is a very successful medical treatment. However, the survivorship of hip, knee, shoulder, and other implants is limited. The degradation of materials and the immune response against degradation products or an altered tissue loading condition as well as infections remain key factors of their failure. Current research in biomechanics and biomaterials is trying to overcome these existing limitations. This includes new implant designs and materials, bearings concepts and tribology, kinematical concepts, surgical techniques, and anti-inflammatory and infection prevention strategies. A careful evaluation of new materials and concepts is required in order to fully assess the strengths and weaknesses and to improve the quality and outcomes of joint replacements. Therefore, extensive research and clinical trials are essential. The main aspects that are addressed in this Special Issue are related to new material, design and manufacturing considerations of implants, implant wear and its potential clinical consequence, implant fixation, infection-related material aspects, and taper-related research topics. This Special Issue gives an overview of the ongoing research in those fields. The contributions were solicited from researchers working in the fields of biomechanics, biomaterials, and bio- and tissue-engineering.
    Keywords: electrocautery ; titanium alloy ; cobalt-chrome alloy ; fatigue behavior ; biomechanical study ; Vertebral body replacement (VBR) ; non metallic ; radiolucent ; CF/PEEK ; biomechanics ; tumor ; vertebral fracture ; spine ; calcium phosphate ; granules ; bone graft substitutes ; total hip arthroplasty ; implant deformation ; acetabulum ; Metasul ; 28 mm small head ; metal-on-metal THA ; cobalt ; chromium ; titanium ; blood metal ions ; inflammation ; cytokines ; metal particles ; metal ions ; synovium ; dual taper modular hip stem ; acetabular revision ; asymptomatic stem modularity ; decision making model ; threshold ; biomaterials ; arthroplasty ; orthopaedic tribology ; experimental simulation ; total knee replacement ; PEEK-OPTIMA™ ; UHMWPE ; third body wear ; modular acetabular cup ; poly-ether-ether-ketone (PEEK) ; ceramics ; ultra-high-molecular-weight polyethylene (UHMW-PE) ; strain distribution ; bone stock ; cup-inlay stability ; disassembly forces ; relative motion ; periprosthetic joint infections ; infection prophylaxis ; Staphylococcus epidermidis ; in vivo osteomyelitis model ; metal wear ; retrieval study ; metal-on-metal articulation ; volumetric wear ; megaendoprosthesis ; total knee arthroplasty ; bone tumor ; Roentgen stereophotogrammetric analysis ; hip arthroplasty ; elementary geometrical shape model ; interchangeability ; head–taper junction ; migration ; ion implantation ; precision casting ; Ti6Al4V ; calcium ; phosphorus ; centrifugal casting ; porous implants ; tantalum ; hip replacement ; revision hip arthroplasty ; primary stability ; backside wear ; cross-linked ; total hip replacement ; hip cup system ; composite ; fibers ; polycarbonate-urethane ; meniscal replacement ; mechanical properties ; meniscus ; silicon nitride ; coating ; joint replacement ; wear ; adhesion ; trunnionosis ; trunnion failure ; fretting corrosion ; head–neck junction ; mechanically assisted crevice corrosion ; implant ; biomaterial ; corrosion ; residual stress ; taper connection ; anodic polarization ; surface treatment ; knee joint ; patellar component ; musculoskeletal multibody simulation ; patellofemoral joint ; polyetheretherketone ; fixation ; debonding ; implant–cement interface ; PMMA ; periprosthetic joint infection ; cement spacer ; articulating spacer ; hip spacer ; two-stage revision ; surface alteration ; surface roughness ; third-body wear ; zirconium oxide particles ; metal-on-cement articulation ; oxford unicompartmental knee arthroplasty ; bearing thickness ; retrieval analysis ; n/a ; biomedical rheology ; viscosity ; bovine calf serum ; shear thinning ; numerical simulation ; thema EDItEUR::K Economics, Finance, Business and Management::KN Industry and industrial studies::KNT Media, entertainment, information and communication industries::KNTX Information technology industries
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    Crystallization Process and Simulation Calculation (2023)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2023-11-30
    Description: As an important unit operation, crystallization is a process in which nucleation, growth, agglomeration, and breakage are regulated to produce high-quality crystals and achieve efficient separation as well as purification. Since a crystallization process often presents the characteristics of strong coupling, nonlinearity, and large lagging, it is a challenge to rationally design a robust, well-characterized process to efficiently crystallize and prepare a high-quality crystalline product. The development of process analytical technology that can provide fast and accurate inline or online measurement is of great importance in the design and control of crystallization processes. Simulation technology, e.g., molecular dynamics simulation and hydrodynamics simulation, can provide time- or location-dependent insight into the process on multiple scales. These experimental and simulation tools can greatly help to further investigate crystallization processes. This Special Issue served to provide a platform for researchers to report results and findings in crystallization process technologies, simulation and process analytical technologies, and relevant crystallization studies.
    Keywords: crystals ; metal-organic frameworks ; Cu(II) ion ; 2D layer ; structural evolvement ; electronic polysilicon ; flow field ; temperature field ; boundary layer ; coupled furnaces ; florfenicol ; solubility ; binary solvent system ; cosolvency ; correlation model ; nanocrystals ; combinative technology ; aqueous solubility ; stability ; dissolution rate ; nucleation ; growth ; mesoscale ; precursor ; EMMS model ; vanadium pentoxide ; cathode ; doping ; rate performance ; crystal image analysis ; deep learning ; size measurement ; crystal growth rate ; silicon single crystals ; floating zone ; effective segregation coefficient ; numerical modelling ; Czochralski growth ; silicon ; crucible ; oxygen concentration ; calcium carbonate ; foreign salts ; antiscalants ; crystallization ; struvite ; fertilizer ; phosphorus ; ammonium ; wastewater ; stirring ; turbulence ; alumina hydrate ; boehmite ; ammonioalunite ; evolutionary process ; reaction crystallization ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
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    Research as Development Perspective (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-03-27
    Description: This Special Issue, “Research as a Development Perspective”, is dedicated to data presented at the first Conference in Chemistry for Graduate/Postgraduate Students and PhD candidates at Aristotle University of Thessaloniki, which was the outcome of research conducted by young chemists in Northern Greece. The conference was organized by the Chemistry Department at Aristotle University of Thessaloniki, the Association of Greek Chemists-Division of Central and Western Macedonia, and the Association of Chemists in Northern Greece. The scope of this conference was to provide young chemists (but also last year’s students) with the opportunity to be well prepared for their next career steps in an increasingly demanding job market. Moreover, they had the possibility of presenting their scientific results to a large audience, which strengthened their soft skills. Lastly, the active engagement of students in the organization of the conference enhanced their teamwork abilities, a highly valuable when developing professional maturity.
    Keywords: HPLC-DAD ; bisphenol A ; 4-Hydroxybenzoic Acid ; 4-Hydroxyacetophenone hydroquinone ; Lactococcus lactis ; reversed-phase liquid chromatography ; ionizable and non-ionizable analytes ; isocratic and gradient elution in different eluent pHs ; computer-assisted separation optimization ; visualization of predicted chromatograms ; silk fibroin ; drug delivery ; magnetic silk fibroin ; bovine serum albumin ; food ; sample preparation techniques ; sulfonamides ; high-performance liquid chromatography ; HPLC ; ultra-high-performance liquid chromatography ; UHPLC ; Derveni ; Ancient Macedonia ; micro-XRF ; XRD ; HS-SPME/GC-MS ; ancient medicines ; ancient pharmaceuticals ; shellfish purple ; porphyra ; high-tin bronzes ; bronzes ; phosphorus ; boron ; inductively coupled plasma ; atomic emission spectrometry ; fertilizers ; acid dissolution ; wet digestion ; NSAIDs ; derivatization ; GC-MS ; serum ; thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GP Research and information: general
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    Engineering of Smart Agriculture (2023)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-04-11
    Description: This Special Issue presents an extract from the reality of smart agriculture, where the combination of modern technologies, innovative solutions, and sustainable approaches to food production classifies this part of science as highly interdisciplinary, multifaceted, and technologically advanced. The need to increase productivity, optimize natural resources, and minimize environmental impact requires new approaches. In this context, smart agriculture is emerging as a solution that combines technology, data, and science to achieve sustainable, efficient, and innovative food production. This Special Issue introduces the field of smart farming, which encompasses a range of advanced technologies. The use of these tools allows for the monitoring and optimization of crop conditions, precise fertilization, the minimization of water and energy usage, and the improvement of crop quality and quantity. In addition, plant monitoring systems are described, which, by means of sensors and data analysis, provide farmers with valuable information about plant health, soil moisture, temperature, and other factors affecting crop growth. A significant part of this monograph deals with the automation of agricultural processes, where robots and machines undertake tasks with high precision and accuracy, contributing to the farmer’s efficiency. This Special Issue aims not only to provide an understanding of smart agriculture but to also inspire the reader to think about the future of agriculture and the ways in which modern food production methods can be improved.
    Keywords: recirculating aquaculture system ; variable-flow regulation model ; circulating pump-drum filter linkage working technique ; machine learning methods ; gene algorithm support vector machine ; controlled environment agriculture ; digital twin ; productivity ; architecture ; optimization ; NDVI ; image processing ; SURF ; SIFT ; SVM ; BP algorithm ; performance ; sweet pepper ; deep neural network ; sprouts ; stimulation with a pulsed magnetic field ; micro and macro components ; ICP-OES ; ground pressure ; paddy soil ; seeding skateboard ; internet of things ; wireless measurement system ; calcium ; magnesium ; phosphorus ; potassium ; copper ; iron ; manganese ; sodium ; zinc ; wild leafy vegetables ; real-time kinematic (RTK) ; precision agriculture ; ISO standard ; global positioning system (GPS) ; GLONASS ; agricultural tractor ; Korean ginseng ; root-rot-disease ; plant segmentation ; deep learning ; Spodoptera frugiperda ; convolutional neural network ; corn insect ; electrical fields ; magnetic fields ; high-voltage electric field ; growth of fruits ; ripening of fruits ; shelf life of fruits ; fungicide resistance ; PCR ; broad-spectrum fungicides ; Fusarium solani ; toxicity ; asymmetric machine-tractor unit ; motion ; stability ; resistance coefficients ; amplitude-frequency characteristic ; phase-frequency characteristic ; quality parameters ; firmness ; total soluble solid ; titratable acidity ; dry matter ; respiration rate ; apple fruit ; model predictive control ; energy management system ; renewable energy ; smart irrigation ; agriculture 4.0 ; maize bulk ; kernel breakage ; vertical pressure ; deformation ; heat production ; sustainable ; agriculture ; rural ; mobile internet technology ; bivariate probit model ; agricultural modernization ; Pakistan ; wheat ; smart ; Zea mays ; stalk diseases ; crop rotation ; stubble ; suppressive soils ; biomass combustion ; broadleaved tree ; pulsed electric field ; calorific value ; UV-C radiation ; stress response ; mechanical properties ; stimulation ; potato tuber ; CFD (Computational Fluid Dynamics) ; terminal velocity ; winnowing machine separation ; chili pepper harvester ; water and fertilizer integration ; pH adjustment ; BP-PID-Smith algorithm ; estimated compensation ; convolutional neural networks ; MATLAB ; hybrid system ; mobile application ; aeration ; airflow resistance ; pore volume ; semi-empirical modelling ; self-compaction ; spatial and temporal ; energy ; environmental contamination ; lettuce ; life cycle assessment ; winter wheat ; leaf greenness index (SPAD) ; protein ; photosynthesis ; nitrogen ; smart agriculture ; weed management ; crop productivity ; computer vision ; analytical procedure ; forklift truck ; interchangeable equipment ; static stability assessment ; typical meteorological sequence ; typical meteorological week ; wastewater treatment ; high-rate algae pond ; solar irradiance ; Finkelstein-Schafer statistics ; southern rice ; threshing loss ; fuzzy PID ; adaptive algorithm ; hilly mountainous areas ; rapeseed pod ; surface area measurement ; 3-D measurement ; side area of oblique cylinders ; rapeseed pod seed testing machine ; n/a ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
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    Challenges and Successes in Identifying the Transfer and Transformation of Phosphorus from Soils to Open Waters and Sediments (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-03-27
    Description: The anthropogenic loading of phosphorus (P) to water bodies continues to increase worldwide, in many cases leading to increased eutrophication and harmful algal blooms. Determining the sources of P and the biogeochemical processes responsible for this increase is often difficult because of the complexity of the inputs and pathways, which vary both in spatial and temporal scales. In order to effectively develop strategies to improve water quality, it is essential to develop a comprehensive understanding of the relationship of P pools with biological uptake and cycling under varied soil and water conditions. In this ebook, eight chapters cover the various aspects of basic-applied research on mineral–P interaction and how these reactions impact P mobilization, bioavailability, transfer, and speciation of P in different soil matrices using advanced analytical methods. Some of these methods include the application of XANES and field-based research related to stream bank legacy nutrients; natural and anthropogenic eutrophication and its relationship to climate change; and the evaluation of the impact of P due to (i) grazing systems, (ii) weathering and vegetation, and iii) soil and manure management practices. In addition, two review chapters take a holistic approach to cover an expansive area of P transformation processes along the cropland–riparian–stream continuum and the assessment of legacy P. Together, these contributions improve our current understanding of the reactions and processes that impact P concentration, speciation, cycling, loss, and transfer from agroecosystems.
    Keywords: eutrophication ; phosphorus ; water quality ; sediment ; dissolved oxygen ; phosphorus mobilization ; climate change ; algae bloom ; legacy sediments ; equilibrium phosphorus concentration ; sorption ; desorption ; anoxic ; chemical P extraction ; microanalysis ; X-ray absorption near-edge structure (XANES) spectroscopy ; soil P ; vertical and horizontal P distribution ; runoff water ; exclusions ; strategic grazing ; dissolved reactive phosphorus ; total phosphorus ; soil test phosphorus ; soil stratification ; soil fertility ; phosphorus cycling ; weathering ; iron speciation ; biogeochemistry ; legacy phosphorus ; speciation ; transformation ; accessibility ; best management practices ; corn silage ; erosion ; nutrient management ; liquid manure ; surface runoff ; agriculture ; riparian buffers ; critical source areas ; overland flow ; hydropedology ; snowmelt ; streamflow ; tile drainage ; phosphorus kinetics ; Fe-Al-hydroxide mixtures ; histidine ; malic acid ; n/a ; thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GP Research and information: general
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    Effects of Mineral Elements on the Environment (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2022-02-01
    Description: Medical mineralogy and geochemistry constitute an important field, yet little attention has been paid to it by scientists, administrators, or the public. The aims of this book are: (a) to focus on a selection of current challenges and research opportunities and (b) to encourage knowledge transfer between geochemists and mineralogists whose work concerns medical problems and medical scientists who study problems surrounding biominerals and geomaterials. This book covers a variety of novel approaches, tools and techniques, and scenarios of contamination in water and wastewater, and is a key resource for policymakers and environmental scientists working hard to address environmental pollutants. The key features are: state-of-the-art techniques for the assessment and remediation of heavy metals, presenting the interdisciplinary impacts of heavy metals, including those on human health, ecosystems and water quality, and including various contamination indices, such as contamination factor, geoaccumulation index, enrichment factor, pollution index and ecological risk index.
    Keywords: phosphorus ; adsorption ; steel slag ; fly ash ; activated clay ; reactor ; Ramganga River ; turbidity ; Landsat 8 SR ; water quality ; Ganges River ; fluoride ; groundwater ; Sustainable Development Goal 6 ; rural community water supply ; weathered basement aquifer ; hydrogeology ; policy change ; risk ; heavy metal ; human health ; pollution indices ; soil ; plant diseases ; nanoparticles ; diseases ; biotic stress ; management ; silver nanoparticles ; zinc nanoparticles ; calcium carbonate nanoparticles ; calcium oxide nanoparticles ; incense sticks ash ; sludge ; eggshell ; terrestrial environment ; radiocesium ; cesium-137 ; radioactive contamination ; cancer risk ; radionuclide ; nuclear accident ; nominal risk ; decision making ; bic Book Industry Communication::G Reference, information & interdisciplinary subjects::GP Research & information: general ; bic Book Industry Communication::P Mathematics & science::PN Chemistry
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    Duckweed: Research Meets Applications (2023)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-03-28
    Description: Duckweed (Lemnaceae) represents a small aquatic monocot plant family presently composed of 36 species. These plants gained importance in recent decades for their applications in wastewater purification, as animal food or human nutrition, as well as for energy production. This Reprint presents 39 manuscripts published in the Special Issue “Duckweed: Research meets applications” of the journal Plants. We provide an overview of the present state of the art of duckweed research in taxonomy of the family, phytoremediation, accumulation of protein or starch, interaction with microorganisms, and phytomonitoring of toxic compounds. This Special Issue also invited the participants of the 6th International Conference on Duckweed Research and Applications (ICDRAs) held in Gatersleben, Germany, organised on behalf of the International Steering Committee on Duckweed Research and Applications (ISCDRAs). This Reprint is organised as follows:1. Introduction; 2. Molecular Characterization and Taxonomy; 3. Phytoremediation: Wastewater; 4. Applications: Accumulation of Protein or Starch; 5. Interaction with Microorganisms; 6. Physiology and Phytomonitoring.The manuscripts were organised by the Guest Editors Viktor Oláh (University of Debrecen, Debrecen, Hungary), Klaus-J. Appenroth (Friedrich Schiller University, Jena, Germany), and K. Sowjanya Sree (Central University Kerala, Periye, India).
    Keywords: Lemnaceae ; remediation ; feed safety ; mineral supplements ; accumulation ; agricultural wastewater ; nutrient recovery ; biosynthesis inhibitor ; duckweed ; occurrence ; overcome ; phytohormones ; wastewater ; density ; surface cover ; circular economy ; lemna ; amino acids ; biomass production ; cultivation ; nutrient medium ; uptake ; water lentils ; yield ; Wolffia sp. ; space plant biology ; astrobiology ; bioregenerative life support system (BLSS) ; biomass ; aquatic plants ; Araceae ; duckweeds ; Lemnoideae ; molecular phylogenetics ; taxonomy ; chlorophyll fluorescence imaging ; PAM fluorometry ; duckweed test ; Spirodela polyrhiza ; phytotoxicity ; hormesis ; interspecific hybrids ; tubulin-based polymorphism ; β-tubulin ; nitrogen assimilation ; nitrate reductase ; nitrite reductase ; glutamine synthetase ; GOGAT ; gene expression ; chlorophyll fluorescence ; electron transport chain ; inflammation ; lutein ; photosystem ; photosynthetic capacity ; relative growth rate ; duckweed-associated bacteria ; Microbacterium ; Azospirillum ; auxin ; AXR1 ; Arabidopsis ; amplified fragment length polymorphism (AFLP) ; biodiversity ; intraspecific diversity ; Lemna minor ; population analysis ; Wolffiella hyalina ; red/blue ratio ; standardized production ; light quality ; light quantity ; controlled environment ; sustainable fish feed ; alternative proteins ; on-growing phase ; barcoding ; chloroplast DNA ; molecular evolution ; aquaponics ; steroid 17β-estradiol ; Scenedesmus quadricauda ; Lemna minor ; fish wastewater ; population growth ; biomolecule synthesis ; machine learning ; image analysis ; machine training ; Lemna ; phytoremediation ; chromosome number ; evolution ; genome size ; karyotype ; microbiome ; 16S rRNA ; metagenome ; stress ; adhesion ; aquatic ; biomonitoring ; microplastics ; microbeads ; anaerobic digestate ; biomass generation ; genotyping ; intraspecific variation ; aquaculture effluents ; IMTA ; RAS ; phytoplankton ; bacteria ; Lemnacea ; alternative protein ; water recovery ; continuous systems ; giant duckweed ; Lymnaea stagnalis ; great pond snail ; microbiota ; adaptation ; herbivory ; tolerance ; resistance ; fatty acids ; DNA barcoding ; diversity ; biogeography ; nitrogen content ; protein concentration ; migration ; heavy metal ; metallothionein ; metal accumulation ; ionomics ; ICP-OES ; micro-XRF ; poly(styrene-co-methylmethacrylate) ; free-floating plant ; freshwater ; microplastic adsorption ; phytotoxic effect ; chronic impact ; manganese toxicity ; ammonium transporter ; transcription factors ; Spirodela ; water pollutants ; nitrogen ; phosphorus ; heavy metals ; agrochemicals wastewater remediation ; plant-microbe interactions ; plant-bacteria associations ; bacterial colonization ; RISA ; Azospirillum brasilense Sp7 ; Azospirillum brasilense Sp245 ; strain-specific primers ; bead-beating ; starch accumulation ; AtPSP1 overexpression ; sulfur deficiency ; Lemna turionifera 5511 ; whole genome sequencing ; abiotic stress management ; biotic stress management ; abiotic stress ; biotic stress ; turion ; Lemna gibba ; polyploidisation ; spontaneous mutation ; n/a ; thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GP Research and information: general ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PST Botany and plant sciences
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    Advances in Water Resource Monitoring and Modelling: Water Quantity and Quality Issues (2023)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-03-30
    Description: The availability of fresh water of good or high quality is essential for the health of people, animals and the environment. The monitoring and modelling of water resources are therefore strategic for achieving a sustainable and inclusive society. This reprint hosts research and review papers featuring different approaches ranging from engineering and environmental sciences (hydrology, ecotoxicology and remote sensing) to economic disciplines (environmental and circular economy). Contributions may be of interest to both researchers and environmental managers.
    Keywords: water supply system ; risk analysis ; risk management ; safety of water supply ; water supply network ; failures ; risk maps ; Epanet ; Indicators of Hydrologic Alteration (IHA) ; cascade dams ; river regime ; suspended sediment transport ; dissolved load transport ; nutrient transport ; Brda river ; subtropical coastal zone ; waste treatment ; ocean dumping ; antiretrovirals ; predicted environmental concentration ; ecotoxicology ; risk assessment ; pollution effects ; circular economy (CE) ; monitoring ; indicators ; economic indicators ; water ; wastewater ; terrestrial evaporation ; components ; Global Land Evaporation Amsterdam Model (GLEAM) ; increasing trends ; spatial–temporal pattern ; evaporative ratio ; Poland ; satellite images ; hyperspectral data ; water quality ; PRISMA ; DESIS ; turbidity ; chlorophyll-a ; aquatic vegetation ; river freezing ; Multilayer Perceptron Neural Network (MLPNN) ; Extreme Gradient Boosting (XGBoost) ; predictor variables ; balanced accuracy ; river flow ; XGBoost algorithm ; trends ; multistep-ahead forecasting ; climate variability ; Ukraine ; phosphorus ; resources ; critical raw materials ; Visegrad Group ; V4 ; sustainable management ; cold season ; 1951–2021 ; snowfall-to-precipitation ratio ; baseflow index ; river regime shift ; lowland river basin ; middle-latitude region ; hydrogeochemical characterization ; seawater intrusion processes ; geothermal water ; mixing processes ; cation exchange ; Los Cabos block ; n/a ; thema EDItEUR::K Economics, Finance, Business and Management::KC Economics::KCM Development economics and emerging economies
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    Recovery and Recycling of Valuable Metals (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
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    Publication Date: 2024-04-11
    Description: Metals have always played a significant role in human life, and the current global growth and prosperity are directly dependent on these materials. With the rapidly growing global demand for metals, their extraction from natural minerals (as their primary sources) has been enhanced, causing a significant reduction in the grade and quality of the ores in ore deposits and leading to the production of huge amounts of waste, which requires management. In light of this, new proposals to develop more advanced metal recovery technologies from minerals are needed. Additionally, the huge quantity of waste generated through all steps of metal production is known to be a source of environmental pollution, while its valorization can create value via recycling metals or even though use in the production of other valuable materials. Such waste valorization is also in line with the United Nations’ Sustainable Development Goals (SDGs), as well as the implementation of the Paris Agreement. In this regard, the recycling of end-user products in order to reproduce valuable metals can also create significant value and reduce mining activities, and thus, their harmful consequences worldwide. Therefore, research and development in the state-of-the-art technologies for the recovery and recycling of metals are absolutely necessary. The aim of this Special Issue was to collect a range of articles on different aspects of valuable metal recovery and recycling from primary and secondary sources, as well as to decipher all new methods, processes, and knowledge in valuable metal production. We hope that this open access Special Issue will provide a great opportunity to demonstrate the work of researchers working in this area all around the world and help to provide new ideas for researchers who are working in the areas of hydrometallurgy, mineral processing, and waste recycling and valorization.
    Keywords: solvent extraction ; t-BAMBP ; rubidium ; cesium ; brine ; chemical precipitation ; recovery ; reduced ilmenite ; synthetic rutile ; aeration leaching ; Becher process ; spent alkaline battery ; recycling ; leaching ; electrowinning ; hydrometallurgy ; techno-economic evaluation ; metal recovery ; rhenium ; molybdenum ; separation ; rare earth elements ; thorium ; uranium ; separation methods ; precipitation ; membrane ; pavement ; bituminous mixtures ; electric arc furnace slag ; ladle furnace slag ; cellulose fibers ; stone mastic asphalt ; sustainability ; steel ; circular economy ; zinc residue ; cobalt hydroxide ; cementation ; oxidative precipitation ; cobalt (Co) ; nickel (Ni) ; aluminum (Al) ; titanium dioxide (TiO2) ; silicon dioxide (SiO2) ; sulfide ; carbon material ; copper ; zinc ; copper processing ; copper leaching ; copper bearing dusts ; cyanex 272 ; ionquest 801 ; cobalt ; nickel ; vanadium extraction process ; vanadium yield ; minimum carbon loss ; temperature strategy ; steelmaking slag ; phosphorus ; 2CaO∙SiO2–3CaO∙P2O5 ; NdFeB magnets ; critical metals ; rare earth elements (REEs) ; focus infrared digestion ; ICP-OES ; electronic waste ; CaO–SiO2–FeO–Al2O3–MgO slag system ; viscosity ; slag structure ; silicate structure ; aluminate structure ; FeO recovery ; weathered crust elution-deposited rare earth ore ; rare earth recovery ; ion-exchange leaching ; chelation ; chelating agents ; polydentate ligands ; pyrometallurgy ; dysprosium ; liquid metal extraction ; phase transformation ; n/a ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Smart Fertilizers and Innovative Organic Amendments for Sustainable Agricultural Systems (2022)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2022-02-24
    Description: Sustainable agricultural practices are needed to provide food security for a growing global population. Food production is usually associated with high nutrient inputs in the form of mineral fertilizers. Since the beginning of agriculture, such practices have led to soil degradation and the release of environmental contaminants. In this Special Issue, we will focus on innovations in organic and inorganic fertilizer production. We welcome studies concerning new approaches for smart fertilizer development, including bioformulations with mineral particles, nanomaterials, and plant growth promoting microorganisms. We especially encourage authors taking advantage of ecological interactions to improve plant nutrient-use efficiency. Moreover, we would like to include contributions that focus on organic amendments to increase or propitiate the terrestrial C sequestration and stabilization, in order to contribute to mitigating climate change at the same time increasing food security by soil fertility, thus making win–win–win scenarios. Such techniques may concern, but are not limited to, innovative organic waste recycling procedures and new applications of mycorrhizae, rhizobioms, or free living soil bacteria and fungi.
    Keywords: earthworms ; frass ; insect excreta ; insect farming ; nitrogen ; phosphorus ; soil fauna ; soil fertility ; waste management ; seed germination ; jellyfish ; blue fertilizer ; soil restoration ; soil amendments ; water use efficiency ; phosphorus sources ; P solubilization ; P acidulation ; relative agronomic efficiency ; pond sediments ; organic fertilizer ; mineral fertilizer ; cucumber ; integrated fish-vegetable farming ; Mekong Delta ; Crotalaria spectabilis ; C. juncea ; 15N natural abundance ; 13C isotopic composition ; transpiration efficiency ; aluminum toxicity ; antioxidant ; barley ; lignin ; phenols ; silicon ; calcareous soil ; humic acid ; phosphorus uptake ; single superphosphate ; wheat ; animal feedstuff ; circular economy ; fertilizer ; greenhouse ; insect larva ; organic waste ; leafy vegetable ; mineral nutrients ; soil structure ; chlorophyll content ; cation exchange capacity ; nitrogen fertilizer ; nitrification inhibitor ; nitrogen leaching ; nitrogen use efficiency ; 3,4-dimethylpyrazole phosphate (DMPP) ; biochar ; compost ; isotopic signature ; carbon mineralization ; plant growth ; n/a ; bic Book Industry Communication::G Reference, information & interdisciplinary subjects::GP Research & information: general ; bic Book Industry Communication::P Mathematics & science::PS Biology, life sciences ; bic Book Industry Communication::J Society & social sciences::JF Society & culture: general::JFC Cultural studies::JFCV Food & society
    Language: English
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    Polymeric Foams (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2023-12-21
    Description: Advances in nanotechnology have boosted the development of more efficient materials, with emerging sectors (electronics, energy, aerospace, etc.) demanding novel materials to fulfill the complex technical requirements of their products. This is the case of polymeric foams, which may display good structural properties alongside functional characteristics through a complex composition and (micro)structure in which a gas phase is combined with rigid ones, mainly based on nanoparticles, dispersed throughout the polymer matrix. In recent years, there has been an important impulse in the development of nanocomposite foams, extending the concept of nanocomposites to the field of cellular materials. This, alongside developments in new advanced foaming technologies which have allowed the generation of foams with micro, sub-micro, and even nanocellular structures, has extended the applications of more traditional foams in terms of weight reduction, damping, and thermal and/or acoustic insulation to novel possibilities, such as electromagnetic interference (EMI) shielding. This Special Issue, which consists of a total of 22 articles, including one review article written by research groups of experts in the field, considers recent research on novel polymer-based foams in all their aspects: design, composition, processing and fabrication, microstructure, characterization and analysis, applications and service behavior, recycling and reuse, etc.
    Keywords: T1-995 ; TP155-156 ; graphene oxide ; n/a ; microstructure ; multi-objective particle swarm optimization ; electromagnetic wave absorption ; polyamide ; lignin ; expandable microspheres ; surfactants ; aluminum microfibers ; biomaterials ; permittivity ; compression properties ; shock compression ; syntactic foams ; 1 ; impact wedge–peel test ; phenolic foams ; 3 ; foam extrusion ; energy conservation ; heat transfer ; heterogeneous nucleation ; polyurethane foam ; leaching test ; functional ; cellulose foam ; impact property ; foam injection molding ; itaconic acid ; composites ; foaming quality ; phosphorus flame retardants ; polymer waste ; metallic tube ; 5-benzene-trisamides ; polyurethane foam composites ; polyetherimide foams ; scCO2 ; Ethylene Propylene Diene Monomer ; thermal conductivity ; ethyl cellulose ; super critical CO2 ; thermal insulation ; cell nucleation ; crystalline ; polypropylene ; PZT ; burning characteristic ; foams ; quasi-static compression tests ; flame-retardant ABS microcellular foams ; nanotubes ; conductivity ; energy absorption capability ; intrinsic toughness ; ternary synergistic effect ; multilayers ; absorbent PMI foam ; semi-rigid polyurethane foams ; phosphorus ; EMI ; supramolecular additives ; MuCell® injection-molding foaming ; piezocomposite ; ultrasonication ; scCO2 foaming ; automobile structural adhesives ; thermogravimetric analysis ; rigid polyurethane foam ; failure mechanism ; mechanical properties ; multifunctional foams ; SANS ; fluoelastomer ; sound absorption coefficient ; acoustic performances ; functional foam ; foam morphology ; mechanical property ; polystyrene foams ; piezoelectric ; graphene ; Pluronic ; epoxy composite foam adhesive ; polymers ; flame retardancy ; core–shell rubber ; extrusion foaming ; equation of state ; cellulose nanofiber ; epoxy ; DOPO ; PUR ; grey relational analysis ; activation energies ; adjacent façade ; electrical conductivity ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: English
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    Ni–Zn–P alloy deposition from sulfate bath: inhibitory effect of zinc (1999)
    Springer
    Journal of applied electrochemistry 29 (1999), S. 1171-1176 
    Details
    ISSN: 1572-8838
    Keywords: alloys ; cyclic voltammetry ; electrodeposition ; electroless deposition ; nickel ; phosphorus ; zinc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Electroless Ni–Zn–P alloy deposition from a sulphate bath, containing sodium hypophosphite as reducer, was investigated. To increase the plating rate, the deposition parameters were optimized. The effect of process parameters (T, pH and [Zn2+]) on the plating rate and deposit composition was examined and it was found that the presence of zinc in the bath has an inhibitory effect on the alloy deposition. As a consequence, the percentage of zinc in the electroless Ni–Zn–P alloys never reaches high values. Using cyclic voltammetry the electrodeposition mechanism of Ni–Zn–P alloys was investigated. It was observed that the zinc deposition inhibits the nickel discharge and, as a consequence, its catalytic activity on hypophosphite oxidation. It was also found that increase in temperature or pH leads to the deposition of nickel rich alloys.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003426904395
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    Structure of (meso-5,10,15,20-tetraphenylporphyrinato) dichlorophosphorus(V) chloride, [P(tpp)Cl2]+Cl− (1995)
    Springer
    Journal of chemical crystallography 25 (1995), S. 231-235 
    Details
    ISSN: 1572-8854
    Keywords: Octahedral ; phosphorus ; chloride
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The title compound [P(tpp)Cl2]+Cl− crystallizes in the space group P21/n witha=10.701(2),b=24.860(2),c=14.799(2), β=94.24(2)°,Z=4. The phosphorus atom has an octahedral coordination geometry formed by the four nitrogen atoms (Np) of the porphyrinato group and the two chloride ions. The average phosphorus-chloride distance is 2.150(1) Å, with phosphorus situated 0.006 Å below the porphyrin ring.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01665175
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    Electrochemical characterization of Fe-Ni-P alloy electrodeposition (1997)
    Springer
    Journal of applied electrochemistry 27 (1997), S. 1198-1206 
    Details
    ISSN: 1572-8838
    Keywords: alloy ; amorphous ; anomalous ; hydrogen ; iron ; nickel ; phosphorus ; plating
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract In this study we have investigated the electrodeposition of amorphous iron–nickel–phosphorus alloys from a sulfate electrolyte. Fe-Ni alloys are known to exhibit an ’anomalous‘ type of plating behaviour in which deposition of the less noble metal is favoured. We have found that the codeposition of phosphorus from hypophosphite in the electrolyte led to a reversal to a ’normal‘ behaviour. This reversal was due both to the suppression of iron and enhancement of nickel partial currents. The overall deposition process is dominated by the hydrogen evolution reaction. This is exacerbated by the low pH needed to codeposit sufficient phosphorus to achieve an amorphous structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018475718629
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    Microstructural characterization and corrosion resistance of Ni–Zn–P alloys electrolessly deposited from a sulphate bath (1999)
    Springer
    Journal of applied electrochemistry 29 (1999), S. 637-645 
    Details
    ISSN: 1572-8838
    Keywords: alloys ; electroless ; microstructure ; morphology ; nickel ; phosphorus ; zinc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Electroless Ni–Zn–P alloy coatings were obtained on an iron substrate from a sulfate bath at various pH values. The effects of changes in bath pH on alloy composition, morphology, microstructure and corrosion resistance were studied. Scanning electron microscopy was performed to observe the morphological change of the deposits with bath pH. Coating crystallinity was investigated by grazing incidence asymmetric Bragg X-ray diffraction and transmission electron microscopy. A transition from an amorphous to polycrystalline structure was observed on increasing the bath alkalinity, and thus decreasing the phosphorus content of the alloys. A single crystalline phase corresponding to face-centred-cubic nickel was identified in the alloys obtained from a strong alkaline solution. An increase in zinc percentage up to 23% in the deposits does not change the f.c.c. nickel crystalline structure. Corrosion potential and polarization resistance measurements indicated that the corrosion resistance of electroless Ni–Zn–P alloys depends strongly on the microstructure and chemical composition. The deposits obtained at pH 9.0–9.5 and with 11.4–12.5% zinc and 11.8–11.2% phosphorous exhibited the best corrosion resistance.
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    URL: http://dx.doi.org/10.1023/A:1026441403282
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    Surface acid property and its relation to SCR activity of phosphorus added to commercial V2O5(WO3)/TiO2 catalyst (1998)
    Springer
    Catalysis letters 53 (1998), S. 65-71 
    Details
    ISSN: 1572-879X
    Keywords: selective catalytic reduction ; nitric oxide reduction ; phosphorus ; acid property
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract To examine the influence of phosphorus on the commercial V2O5(WO3)/TiO2 SCR catalyst, measurements were carried out by means of infrared and Raman spectroscopy, XPS, and NO reduction measurement as a function of phosphorus loading. Phosphorus added to the catalyst was found to disperse well over the catalyst without a significant agglomeration up to 5 wt% P2O5 addition. The number of the hydroxyl groups bonded to the vanadium and titanium species decreased readily with increasing amount of phosphorus. Correspondingly, the hydroxyl groups bonded to the phosphorus species were formed. NH3 adsorbed on both hydroxyl groups bonded to vanadium and phosphorus as ammonium ions, implying that the P–OH groups formed are also responsible for the Brønsted acidity. The NO reduction activity was found to be decreased with increasing amount of phosphorus; however, the influence of phosphorus was relatively small irrespective of the large amount of phosphorus addition. The deactivation might be caused by the change in the nature of the surface hydroxyl groups as Brønsted acid sites. Phosphorus species might partially wrap the surface V=O and W=O groups, which might also contribute to the deactivation.
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    URL: http://dx.doi.org/10.1023/A:1019020931117
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  • 44
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    The ecosystem of a mesotrophic lake-II. Interactions among nutrient load, river flow, and epilimnion depth (1991)
    Springer
    Aquatic sciences 53 (1991), S. 263-272 
    Details
    ISSN: 1420-9055
    Keywords: Lake ecosystem ; chl-a ; phosphorus ; nitrogen ; river flow ; thermocline ; simulation model ; multiple regression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The management variables which primarily affect phytoplankton biomass (as chl-a) in Lake Mjøsa, Norway, are total phosphorus loading (TP) and the timing and volume of water through flow (by active storage reservoirs). The response of the lake to changes in these factors is studied using a simulation model of the lake ecosystem. Chl-a responses from both observed data and the simulated results are extracted by multiple regression. Results show that decreasing TP load decreases chl-a, but less at low TP levels (〈 10 mg TP · m−3). There is also a certain time period for peak river flow which gives the least yield of chl-a per unit TP. This time period occurs in early summer (i.e., around June 10) if the total phosphorus load is low, and later if the load is high. Both observations and simulation results show that a high water flow increases chl-a at low epilimnion depths (〈 15 m), but that the same high water flow decreases chl-a when epilmnion is deep.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877062
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    The short term response to eutrophication abatement (1990)
    Springer
    Aquatic sciences 52 (1990), S. 199-220 
    Details
    ISSN: 1420-9055
    Keywords: Eutrophication ; lake management ; phosphorus ; ecosystem ; chlorophyll-a ; mathematical modelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We compare results of a new model for predicting the short term inter annual changes in chlorophyll-a (chl-a) in lakes after reductions in total phosphorus (TP) to predictions made by least squares regression models. In the new method, slopes of chl-a/TP graphs (both axes in mg · m−3) are depicted in frequency diagrams and used to extract information on the expected, short term chl-a/TP response. The short term response for nine shallow (〈 10 m deep) and nutrient rich lakes to changes in TP was found to be: Chl-a = 0.49 · TP + 17.3, and for nine deep, P-limited lakes: Chl-a = 0.08 · TP + 3.5. If the TP-reduction is known to be greater than 10 mg · m−3, the expected slope increases to 0.58 for shallow lakes and to 0.26 for deep lakes. The slope, 0.58, is 8% lower than the slope for the long term response calculated by regression for the shallow lakes. For deep lakes the slope, 0.26, is 2 to 3 times higher than that calculated by regression, indicating that reductions in TP for deep lakes give greater effects than least squares regression equations suggest. We have also calculated the reduction in TP which will give about 80% probability that a reduction in chl-a will be observed next year. For shallow, P-limited lakes this reduction is about 30 mg · m−3 (5% of average initial in-lake TP concentration), and for deep lakes about 14 mg · m−3 (35% of average initial in-lake TP concentration).
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    URL: http://dx.doi.org/10.1007/BF00877280
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    Vertical mixing in Überlinger See, western part of Lake Constance (1990)
    Springer
    Aquatic sciences 52 (1990), S. 256-268 
    Details
    ISSN: 1420-9055
    Keywords: Vertical mixing ; stratification ; phosphorus ; Lake Constance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Depth variable vertical eddy diffusion coefficients for heat (K z) were calculated from continuously measured temperature profiles in Überlinger See (western part of Lake Constance). The temperatures were averaged over vertical intervals of 10 m yielding 14 discrete values (maximum depth of Überlinger See: 147 m). A linear fit from 10 June to 29 September 1987 was used to smooth the significant temperature fluctuations caused by internal seiches of Lake Constance. Assuming horizontal homogeneity for the smoothed data the Gradient-Flux-Method was applied to compute vertical diffusion coefficientsK z at different depths using the depth variable volumes and surfaces of the 14 layers. The resulting mean diffusion coefficients for the period from June to September are 0.04 cm2/s near the thermocline and up to 0.8 cm2/s in deeper strata (accuracy: ± 50%). It is shown that horizontal mixing between Überlinger See and Obersee (main lake) alters the computation ofK z by less than 50%. A relationship betweenK z and stability (Brunt-Väisälä) frequencyN is found which corresponds well to the theory of internal wave induced turbulence. Combining the diffusion coefficients with measured phosphorus profiles, a phosphorus flux from the hypolimnion to the epilimnion of (0.7 ± 0.4) mg P m−2 d−1 was calculated, corresponding to about 20% of the average external loading per area of Lake Constance in 1986.
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    Measurement of total dissolved phosphorus in small volumes of iron rich interstitial water (1992)
    Springer
    Aquatic sciences 54 (1992), S. 1-9 
    Details
    ISSN: 1420-9055
    Keywords: Sediment ; interstitial water ; phosphorus ; iron ; persulfate digestion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract It is shown that sorption of orthophosphate to iron compounds, formed during persulfate digestion, can cause a significant underestimation of total dissolved phosphorus in interstitial waters rich in iron and poor in phosphorus. Labelling the samples with carrier free32PO4 before digestion allows to correct for these losses.
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  • 48
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    Effects of repeated manure and fertilizer phosphorus additions on soil phosphorus dynamics under a soybean-wheat rotation (1999)
    Springer
    Biology and fertility of soils 28 (1999), S. 150-155 
    Details
    ISSN: 1432-0789
    Keywords: Key words Phosphorus dynamics ; Olsen ; phosphorus ; Soil phosphorus fractions ; Manure ; Soybean-wheat rotation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  Soil P availability and efficiency of applied P may be improved through an understanding of soil P dynamics in relation to management practices in a cropping system. Our objectives in this study were to evaluate changes in plant-available (Olsen) P and in different inorganic P (Pi) and organic P (P0) fractions in soil as related to repeated additions of manure and fertilizer P under a soybean-wheat rotation. A field experiment on a Typic Haplustert was conducted from 1992 to 1995 wherein the annual treatments included four rates of fertilizer P (0, 11, 22 and 44 kg ha–1 applied to both soybean and wheat) in the absence and presence of 16 t ha–1 of manure (applied to soybean only). With regular application of fertilizer P to each crop the level of Olsen P increased significantly and linearly through the years in both manured and unmanured plots. The mean P balance required to raise Olsen P by 1 mg kg–1 was 17.9 kg ha–1 of fertilizer P in unmanured plots and 5.6 kg ha–1 of manure plus fertilizer P in manured plots. The relative sizes of labile [NaHCO3-extractable Pi (NaHCO3-Pi) and NaHCO3-extractable P0 (NaHCO3-P0)], moderately labile [NaOH-extractable Pi (NaOH-Pi) and NaOH-extractable P0 (NaOH-P0)] and stable [HCl-extractable P (HCl-P) and H2SO4/H2O2-extractable P (resisual-P)] P pools were in a 1 : 2.9 : 7.6 ratio. Application of fertilizer P and manure significantly increased NaHCO3-Pi and -P0 and NaOH-Pi, and -P0 fractions and also total P. However, HCl-P and residual-P were not affected. The changes in NaHCO3-Pi, NaOH-Pi and NaOH-P0 fractions were significantly correlated with the apparent P balance and were thought to represent biologically dynamic soil P and act as major sources and sinks of plant-available P.
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    URL: http://dx.doi.org/10.1007/s003740050477
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    Determination of P/Al ratio in phosphorus-doped aluminium oxide thin films by XRF, RBS and FTIR (1995)
    Springer
    Microchimica acta 119 (1995), S. 13-22 
    Details
    ISSN: 1436-5073
    Keywords: aluminium oxide ; phosphorus ; XRF ; RBS ; FTIR
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Phosphorus-doped aluminium oxide thin films were deposited in a flow-type ALE reactor from AlCl3, H2O and from either P2O5 or trimethyl-phosphate. Structural information of the films was obtained from Fourier transform infrared (FTIR) spectra. Rutherford backscattering spectroscopy (RBS) was used to quantitatively determine the composition of the films. The P/Al intensity ratios calculated from X-ray fluorescence (XRF) results were in a linear relation with the P/Al concentration ratios calculated from RBS results. For comparison, the intensity ratios of the phosphorus peak (P=O) at about 1250 cm−1 and the aluminium peak (Al-O) at about 950 cm−1 were determined from the IR absorption spectra. The calibration of FTIR peak intensities was done by plotting the intensity ratios of phosphorus and aluminium peaks against the P/Al concentration ratios measured by RBS. FTIR gave also a linear calibration curve with RBS but the method is less suitable for routine analysis of P/Al ratio than XRF.
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    Determination of phosphorus, sulfur and chlorine in high-purity aluminium (1990)
    Springer
    Microchimica acta 101 (1990), S. 273-279 
    Details
    ISSN: 1436-5073
    Keywords: aluminium analysis ; phosphorus ; sulfur ; chlorine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Multi-step procedures for the determination of phosphorus, sulfur and chlorine are described and tested against established methods and on reference materials. Phosphorus is separated as hydrogen phosphide, extracted as phosphomolybdic acid, reduced to molydenum blue and measured photometrically (detection limit 0.05 μg/g). Sulfur is separated after reduction as hydrogen sulfide or by means of pyrohydrolysis and measured by ICP-OES (detection limit 0.1 μg/g). Chloride can be measured by ion chromatography after pyrohydrolytic separation (detection limit 0.1 μg/g). The determination of sulfur was also successfully tested on copper and steel samples.
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    Extraction inductively coupled plasma-optical emission spectrometry (ICP-OES) determination of traces of phosphorus in tungsten (1989)
    Springer
    Microchimica acta 99 (1989), S. 399-412 
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    ISSN: 1436-5073
    Keywords: phosphorus ; tungsten ; preconcentration ; ICP-OES
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A method for the separation and preconcentration of traces of phosphorus from tungsten was developed. Solid phase extraction of the phosphovanadomolybdate complex performed on a micro-column was applied. Phosphorus was determined by optical emission spectroscopy (OES) with inductively coupled plasma (ICP) excitation. A limit of detection of 0.4 μg/g P with respect to the solid phase is obtained. By directly coupling the extraction/elution step to the ICP instrument a detection limit of 0.06 μg/g P in W was achieved. Besides, the complexity of spectral evaluation in ICP-OES determinations of traces in spectralline-rich matrices is discussed.
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    Elemental analysis of organic phosphorus compounds X. Schöniger-flask method for phosphorus (1986)
    Springer
    Microchimica acta 88 (1986), S. 245-247 
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    ISSN: 1436-5073
    Keywords: Schöniger-flask method ; phosphorus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract By use of a fused-silica hook for holding the sample packet in a Schöniger combustion flask, even difficultly combustible phosphorus compounds can be completely decomposed.
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    URL: http://dx.doi.org/10.1007/BF01196617
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    The determination of phosphonate base scale inhibitors in brines by plasma spectrometry (1992)
    Springer
    Microchimica acta 109 (1992), S. 201-209 
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    ISSN: 1436-5073
    Keywords: phosphonate base scale inhibitor ; brine ; direct current plasma ; inductively coupled plasma atomic emission spectrometry ; phosphorus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The determination of phosphonate base scale inhibitors in brines by direct current plasma (DCP) and inductively coupled plasma atomic emission spectrometry (ICP-AES) is described. The first method is based on a direct nebulization of the brine samples and plasma using the phosphorus line at 213.618 nm. The second method involves extraction of phosphorus as phospho-antimonyl molybdate complex into methylisobutyl ketone (MIBK) phase and analysis of the extract for molybdenum using the Mo 313.260 nm line. Comparison between the proposed methods and an established recommended method [1] shows excellent agreement between the results in addition to the sensitivity and ease of automation provided by AES.
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    Historical changes in sediments of Pyramid Lake, Nevada, USA: consequences of changes in the water balance of a terminal desert lake (1994)
    Springer
    Journal of paleolimnology 12 (1994), S. 87-101 
    Details
    ISSN: 1573-0417
    Keywords: Great Basin ; climatic variations ; productivity ; organic matter ; nitrogen ; phosphorus ; hardwater lake
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Sediment cores from the shallow and deep basins of Pyramid Lake, Nevada, revealed variations in composition with depth reflecting changes in lake level, river inflow, and lake productivity. Recent sediments from the period of historical record indicate: (1) CaCO3 and organic content of sediment in the shallow basin decrease at lower lake level, (2) CaCO3 content of deep basin sediments increases when lake level decreases rapidly, and (3) the inorganic P content of sediments increases with decreasing lake volume. Variations in sediment composition also indicate several periods for which productivity in Pyramid Lake may have been elevated over the past 1000 years. Our data provide strong evidence for increased productivity during the first half of the 20th Century, although the typical pattern for cultural eutrophication was not observed. The organic content of sediments also suggests periods of increased productivity in the lake prior to the discovery and development of the region by white settlers. Indeed, a broad peak in organic fractions during the 1800's originates as an increase starting around 1600. However, periods of changing organic content of sediments also correspond to periods when inflow to the lake was probably at extremes (e.g. drought or flood) indicating that fluctuations in river inflow may be an important factor affecting sediment composition in Pyramid Lake.
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    An expanded weighted-averaging model for inferring past total phosphorus concentrations from diatom assemblages in eutrophic British Columbia (Canada) lakes (1995)
    Springer
    Journal of paleolimnology 14 (1995), S. 49-67 
    Details
    ISSN: 1573-0417
    Keywords: diatoms ; eutrophication ; lake management ; paleolimnology ; British Columbia ; lakes ; phosphorus ; training sets
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Eighteen lakes were added to a published training set of 46 British Columbia (BC) lakes in order to expand the original range of total phosphorus (TP) concentrations. Canonical correspondence analysis (CCA) was used to analyze the relationship between diatom assemblages and environmental variables. Specific conductivity and [TP] each explained significant (P≤0.05) directions of variance in the distribution of the diatoms. The relationship between diatom assemblages and [TP] was sufficiently strong to warrant the development of a weighted-averaging (WA) regression and calibration model that can be used to infer past trophic status from fossil diatom assemblages. The relationship between observed and inferred [TP] was not improved by the addition of more eutrophic lakes, however the [TP] range and the number of taxa used in the transfer function are now superior to the original model. Diatom species assemblages changed very little in lakes with TP concentrations greater than 85 µg 1−1, so we document the development of a model containing lakes with TP≤85 µg 1−1. The updated model uses 59 training lakes and covers a range of species optima from 6 to 41.9 µg 1−1 TP, and a total of 150 diatom taxa. The updated inference model provided a more realistic reconstruction of the anthropogenic history of a highly eutrophic BC lake. The model can now be used to infer past nutrient conditions in other BC lakes in order to assess changes in trophic status.
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    URL: http://dx.doi.org/10.1007/BF00682593
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    Variability of diatom-inferred phosphorus profiles in a small lake basin and its implications for histories of lake eutrophication (1998)
    Springer
    Journal of paleolimnology 20 (1998), S. 47-55 
    Details
    ISSN: 1573-0417
    Keywords: diatoms ; spatial variability ; canonical correspondence analysis ; lake eutrophication ; transfer functions ; phosphorus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Diatom analyses were undertaken of sediment cores covering a range of water depths in a small eutrophic lake (Lough Augher, Co. Tyrone, N. Ireland). The significance of between-core variability in diatom relative frequency stratigraphy was assessed by Canonical Correspondence Analysis (CCA) where the ordination axes were constrained to external environmental variables (sediment depth, core location coordinates, water depth, effective fetch, distance-from-shore and distance-from-inflow). After the removal of the effect of sediment age by partialling it out, the resultant first two axes from the partial-CCA were significantly correlated with water depth and distance-from-shore, indicating non-uniform diatom stratigraphies across the lake. Despite this variability, all cores show the same succession of species and, therefore, record the eutrophication of the lake. Diatom-inferred total phosphorus (DI-TP) was inferred for six cores using weighted averaging regression and calibration. Apart from considerable differences of DI-TP in surficial sediment samples, there was good between-core repeatability of DI-TP profiles. These data support the use of DI-TP for establishing background nutrient concentrations for lakes, and associated implications for lake restoration schemes using single cores. Comparisons of DI-TP profiles and total diatom accumulation rate data for the individual cores indicate that diatom production peaked prior to the maximum TP concentrations in the lake.
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    URL: http://dx.doi.org/10.1023/A:1007923813511
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    Stable isotope (δ13C and δ15N) signatures of sedimented organic matter as indicators of historic lake trophic state (1999)
    Springer
    Journal of paleolimnology 22 (1999), S. 205-221 
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    ISSN: 1573-0417
    Keywords: carbon isotopes ; diatoms ; lake management ; nitrogen isotopes ; phosphorus ; radium-226 ; sediments ; trophic state
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract We explored the use of carbon and nitrogen isotopes (δ13C and δ15N) in sedimented organic matter (OM) as proxy indicators of trophic state change in Florida lakes. Stable isotope data from four 210Pb-dated sediment cores were compared stratigraphically with established proxies for historical trophic state (diatom-inferred limnetic total phosphorus, sediment C/N ratio) and indicators of cultural disturbance (sediment total P and 226Ra activity). Diatom-based limnetic total P inferences indicate a transition from oligo-mesotrophy to meso-eutrophy in Clear Lake, and from eutrophy to hypereutrophy in Lakes Parker, Hollingsworth and Griffin. In cores from all four lakes, the carbon isotopic signature of accumulated OM generally tracks trophic state inferences and cultural impact assessments based on other variables. Oldest sediments in the records yield lower diatom-inferred total limnetic P concentrations and display relatively low δ13C values. In the Clear, Hollingsworth and Parker records, diatom-inferred nutrient concentrations increase after ca. AD 1900, and are associated stratigraphically with higher δ13C values in sediment OM. In the Lake Griffin core, both proxies display slight increases before ~1900, but highest values occur over the last ~100 years. As Lakes Clear, Hollingsworth and Parker became increasingly nutrient-enriched over the past century, the δ15N of sedimented organic matter decreased. This reflects, in part, the increasing relative contribution of nitrogen-fixing cyanobacteria to sedimented organic matter as primary productivity increased in these waterbodies. The Lake Griffin core displays a narrow range of both δ13C and δ15N values. Despite the complexity of carbon and nitrogen cycles in lakes, stratigraphic agreement between diatom-inferred changes in limnetic total P and the stable isotope signatures of sedimented OM suggests that δ13C and δ15N reflect shifts in historic lake trophic state.
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    URL: http://dx.doi.org/10.1023/A:1008078222806
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    Calibration of diatoms along a nutrient gradient in Florida Everglades Water Conservation Area-2A, USA (1999)
    Springer
    Journal of paleolimnology 22 (1999), S. 413-437 
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    ISSN: 1573-0417
    Keywords: diatoms ; Everglades ; phosphorus ; wetland ; calibration ; multivariate ; Florida
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract The relationship between diatom taxa preserved in surface soils and environmental variables at 31 sites in Water Conservation Area 2A (WCA-2A) of the Florida Everglades was explored using multivariate analyses. Surface soils were collected along a phosphorus (P) gradient and analyzed for diatoms, total P, % nitrogen (N), %carbon (C), calcium (Ca), and biogenic silica (BSi). Phosphorus varied from 315-1781 μg g-1, and was not found to be correlated with the other geochemical variables. Canonical correspondence analysis (CCA) was used to examine which environmental variables correlated most closely with the distributions in diatom taxa. Canonical correspondence analysis with forward selection, constrained and partial CCA, and Monte Carlo permutation tests of significance show the most significant changes in diatom assemblages along the P gradient (p 〈 0.01), with additional species differences correlated with soil C, N, Ca, and BSi. Weighted-averaging (WA) regression and calibration models of diatom assemblages to P and BSi were developed. The diatom-based inference model for soil [P] had a high apparent r2 (0.86) with RMSEboot = 218 μg g-1. Indicator diatom species identified by assessing species WA optima and WA tolerance to [P], such as Nitzschia amphibia and N. palea for high [P] (~1300-1400 μ g-1) and Achnanthes minutissima var. scotica and Mastogloia smithii for low [P] (~400-600 μg g-1), may be useful as monitoring tools for eutrophication in WCA-2A as well as other areas of the Everglades. Diatom assemblages analyzed by cluster analysis were related to location within WCA-2A, and dominant taxa within clusters are discussed in relation to the geochemical variables measured as well as hydrology and pH. Diversity of diatom assemblages and a ‘Disturbance Index’ based on diatom data are discussed in relation to the historically P-limited Everglades ecosystem. Diatom assemblages should be very useful for reconstructions of [P] through time in the Florida Everglades, provided diatoms are well preserved in soil cores.
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    URL: http://dx.doi.org/10.1023/A:1008049224045
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    Modern and historic accumulation rates of phosphorus in Lake Okeechobee, Florida (1998)
    Springer
    Journal of paleolimnology 20 (1998), S. 31-46 
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    ISSN: 1573-0417
    Keywords: phosphorus ; Lake Okeechobee ; lead-210 dating ; eutrophication ; phosphorus loading
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Phosphorus accumulation rates in depositional zone sediments of Lake Okeechobee were determined in 11 mud-zone cores and two peat-zone cores dated by 210Pb. Although difficulties were encountered in interpreting 210Pb data from some sites, reliable dating of sediments from the mud zone of this shallow lake is possible. Sediment accumulation rates in this zone have increased during the present century by an average of about twofold, and accumulation of organic sediments in the lake during pre-settlement times apparently was much slower than during the past century. Concentrations of all forms of sedimentary P but especially nonapatite inorganic-P and organic-P also have increased since pre-settlement times and especially since about 1940. Annual P accumulation rates in the lake's sediments have increased about fourfold during the 1900s, with most of the increase occurring in the past 40–50 years. The recent accumulation rate of sedimentary P (past ~ 10 years) agrees within a factor of 1.5 with the net retention of P in the lake calculated from published input-output mass balances.
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    URL: http://dx.doi.org/10.1023/A:1007939714301
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    Fertilizer regime and changes in the phosphate and potash status of a silty marine clay soil during 25 years (1980)
    Springer
    Nutrient cycling in agroecosystems 1 (1980), S. 95-101 
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    ISSN: 1573-0867
    Keywords: soil fertility ; phosphorus ; potassium ; green manure ; crop rotation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Changes in the soil phosphorus and potassium status on three farming systems in the Northeast Polder during 25 years are related to the fertilizer regime over this period. The changes in the nutrient status of the soil are reflected in fertilizer policy. High rates of phosphate dressings markedly increased the phosphate status of the soil and built up a reserve of phosphate. In contrast, the potassium status decreased by about half, because only potatoes in the rotation were dressed with potassium. Methods of fertilization are discussed and suggestions are made with regard to possible improvements.
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    URL: http://dx.doi.org/10.1007/BF01073181
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    The variation of element contents in triticale during vegetative growth (1987)
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    Nutrient cycling in agroecosystems 13 (1987), S. 155-159 
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    ISSN: 1573-0867
    Keywords: triticale ; contents of nitrogen ; phosphorus ; potassium ; calcium ; magnesium ; trace elements ; heavy metals ; stage of growth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Zusammenfassung Es wurden die Schwankungen in den Konzentration von N, P, K, Ca, Mg, Fe, Mn, Zn, Cu, B, Ba, Be, Bi, Sn, Sr, Sb, Ti, Te, V, Se, As und Hg in Triticale unter Feldbedingungen untersucht. Von der Bestockung bis zur Vollreife wurden alle 10 Tage von je 0.5 m2 pro Parzelle Pflanzenproben genommen. In allgemeinen haben die Konzentrationen von Frühjar bis zur Ernte abgenommen. Der elementengehalt in Triticale war demjenigen der übrigen Getreidearten verschieden, aber der Trend der Änderungen war ähnlich.
    Notes: Abstract The variation of N, P, K, Ca, Mg, Fe, Mn, Zn, Cu, B, Ba, Be, Bi, Sn, Sr, Sb, Ti, Te, V, Se, As and Hg concentrations was studied under field conditions in triticale. The samples were collected every 10 days from tillering to full ripening stage using plant material from 0.5 m2 per plot. The concentrations generally decreased from early growth to harvest. The elemental concentrations in triticale differed from the other cereals, but the variation's trend was similar.
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    URL: http://dx.doi.org/10.1007/BF01064828
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    Effect of nitrogen, phosphorus and soil and crop residues management practices on maize (Zea mays L.) yield in ultisol of eastern Cameroon (1987)
    Springer
    Nutrient cycling in agroecosystems 14 (1987), S. 135-142 
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    ISSN: 1573-0867
    Keywords: nitrogen ; phosphorus ; soil and crop residues management practices ; maize yield ; Plinthudult ; Cameroon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The shortening of fallow period in several areas in tropical Africa has reduced soil fertility and exposed soils to erosion and run-off. Fertilizer application and crop conservation practices are needeed to sustain high crop yield and to conserve the natural resource base for upland crop production in the continent. Field trials were carried out to evaluate the effect of fertilizer application and soil and crop residues management practices on yield of maize (Zea mays L.) planted on a Plinthudult soil at Bertoua, Eastern Cameroon. Maize yields increased significantly with nitrogen and phosphorus fertilizer application. Under the rainfall pattern prevailing in the area, the amount of nitrogen required for maximum yield was higher in the second season. On the other hand, the amount of phosphorus required for maximum yield appeared to decrease with time. The burning of crop residues and weeds prior to planting together with no-till practive gave higher yield of maize than other soil and crop residues management practices.
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    URL: http://dx.doi.org/10.1007/BF01066606
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    Africa — how much fertilizer needed: Case study of Sierra Leone (1988)
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    Nutrient cycling in agroecosystems 17 (1988), S. 101-118 
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    ISSN: 1573-0867
    Keywords: Nitrogen ; phosphorus ; potassium ; organic matter ; fallow ; forecasting ; fertilizer requirement ; Sierra Leone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The quantities of nitrogen, phosphorus and potassium supplied by an ‘average’ African soil cleared from bush fallow, assuming no losses, were approximated. Values ranged from 23 to 120 Kg N ha−1, 1.8 to 12 Kg P ha−1, 47 to 187 Kg K ha−1, depending on type of fallow, length of fallow, drainage and extent of depletion of native supplies. Additional amounts of 4 to 5 Kg N ha−1, 4 to 6 Kg P ha−1 and 14 to 20 Kg K ha−1 are obtained from the ash. Using crop nutrient removal data and approximate efficiencies of native and fertilizer N, P and K, fertilizer requirements at the reconnaissance level were estimated for selected target yields. For newly cleared uplands at cropping/fallow ratio of 2:7, N fertilizer requirements for cassava (30 t ha−1), maize (4 t ha−1), and sweet potato (16 t ha−1), were 138, 98, 42 kg ha−1 respectively. Wetland rice (4 t ha−1) required 55 kg N ha−1. Corresponding P fertilizer requirements for cassava, maize, sweet potato, upland rice (1.5 t ha−1) and ground-nut (1 t ha−1) were 190, 80, 30, 30 and 16 kg P ha−1 respectively. Wetland rice required 83 kg P ha−1. Substantial residual values of applied P are to be expected. Cassava required 60 kg ha−1 of K on newly cleared land. In soils of lowered nutrient status higher N, P, and K fertilizer requirements were indicated for all crops. Land use data from Sierra Leone were used to illustrate how the total quantities of N, P and K fertilizers in a country in the forest zone of Africa can be approximated. Fertilizer needs in Sierra Leone were in decreasing order P 〉 N ≫ K. N, P and K requirements were estimated to be 10,000 t, 20,000 t and 4,000 t respectively. The nutrient balance sheet method described in this paper is a useful tool to estimate the order of magnitude of fertilizer requirement at selected target yields for countries in Africa.
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    URL: http://dx.doi.org/10.1007/BF01050271
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    Fertilizer requirement of rice-wheat and maize-wheat rotations on coarse-textured soils amended with farmyard manure (1988)
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    Nutrient cycling in agroecosystems 17 (1988), S. 153-164 
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    ISSN: 1573-0867
    Keywords: farmyard manure ; maize ; nitrogen ; phosphorus ; rice ; wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Field experiments with rice-wheat rotation were conducted during five consecutive years on a coarse-textured low organic matter soil. By amending the soil with 12t FYM ha−1, the yield of wetland rice in the absence of fertilizers was increased by 32 per cent. Application of 80 kg N ha−1 as urea could increase the grain yield of rice equivalent to 120 kg N ha−1 on the unamended soil. Although the soil under test was low in Olsen's P, rice did not respond to the application of phosphorus on both amended and unamended soils. For producing equivalent grain yield, fertilizer requirement of maize grown on soils amended with 6 and 12 t FYM ha−1 could be reduced, respectively to 50 and 25 per cent of the dose recommended for unamended soil (120 kg N + 26.2 kg P + 25 kg K ha−1). Grain yield of wheat grown after rice on soils amended with FYM was significantly higher than that obtained on unamended soil. In contrast, grain yield of wheat which followed maize did not differ significantly on amended or unamended soils.
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    URL: http://dx.doi.org/10.1007/BF01050276
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    Phosphorus management of a rice-wheat cropping system (1989)
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    Nutrient cycling in agroecosystems 20 (1989), S. 27-32 
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    ISSN: 1573-0867
    Keywords: Cropping system ; phosphorus ; rice ; wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A long term field experiment was conducted on a sandy loam soil from 1983 to 1987 to determine how to best apply phosphorus fertilizer in a rice-wheat cropping system. The treatments included 9 combinations of phosphorus application either to both rice and wheat or to rice or wheat alone. Direct application of phosphorus at 13 kg/ha to both the crops resulted in significantly higher total productivity of the rice-wheat cropping system as compared with 26 kg P/ha applied either to rice or wheat alone. Phosphorus at 13 kg/ha for rice and 26 kg/ha for wheat was as efficient as 13 kg P/ha for rice and 13 kg P/ha for wheat. The higher rate of P (26 kg/ha) applied to both rice and wheat resulted a decline in the total productivity. The residual effects of phosphorus applied to either rice or wheat were significant to the succeeding crop but was inferior to its direct application. Phosphorus increased the leaf area index, chlorophyll content of leaves, and interception of more photosynthetically active radiation (PAR) which resulted in increased grain yield of rice and wheat. Phosphorus status of the surface soil declined markedly, in the absence of P application from 15.4 to 6.4 kg P/ha. Phosphorus applied at 26 kg P/ha to both the crops resulted a build up of the available P status of soil. Phosphorus application at 13 kg/ha to both rice and wheat maintained the phosphorus status of the soil at original level.
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    Hydrology of the Peel-Harvey estuary catchment (1993)
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    Nutrient cycling in agroecosystems 36 (1993), S. 127-133 
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    ISSN: 1573-0867
    Keywords: hydrology ; water balance ; phosphorus ; Streamflow ; Peel-Harvey
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract This paper discusses the land types, hydrologic characteristics and processes, and the major modification of these, in relation to mechanisms and magnitude of phosphorus losses to drains and riverine systems which discharge to the Peel-Harvey estuary. About 75% of the coastal plain part of the catchment is cleared of native vegetation and used for dryland, dairy and beef grazing. There are small areas devoted to irrigated pasture and commercial horticulture. Seventy-five percent of the soils of the catchment are sandy surfaced with a poor capacity to retain phosphorus. Though the area is flat, catchment water yields are high because of a large winter rainfall excess and low soil storage capacity. Drainage schemes have been constructed in much of the catchment to remove excess water quickly. This was required initially to allow agricultural expansion and is now important for protecting a growing infrastructure which serves the most populous region of Western Australia.
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    URL: http://dx.doi.org/10.1007/BF00747583
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    Phosphorus and mycorrhizal interaction on uptake of P and trace elements by maize (1989)
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    Nutrient cycling in agroecosystems 21 (1989), S. 19-22 
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    ISSN: 1573-0867
    Keywords: VAM fungi ; phosphorus ; molybdenum ; interaction ; maize
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Vesicular arbuscular mycorrhizal fungi (VAM) when applied to soils can result in marked increases in plant growth and P uptake. Application of molybdenum can also result in a synergistic interaction with phosphorus, with reslutant increases in plant dry matter production. The current investigation was designed to evaluate P X Mo X VAM interactions on yield and P uptake of sweet corn (Zea mays L.) The experiment was conducted in the greenhouse using soils from Missouri and Jamaica (West Indies) which were very low in available soil P. Corn was grown in pots amended with P and VAM, with and without Mo. Colonizing Jamaican soil amended with P withGlomus etunicatum increased shoot dry matter weights significantly. Greatest P uptake occured in treatments receiving the highest application of P and mycorrhizal inoculation. There was a significant difference between the two soils with respect to treatment effects on micronutrient accumulation of the test crop. The decreases in Cu, Zn, Mn, and Mo concentration of corn leaves between control and the treated pots, is attributed to dry matter dilution effect. The results indicated that mycorrhizal inoculation increased the dry matter significantly in Jamaican soil amended with P, however not in Missouri soil.
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    Environmental impact of fertilizing soils by using sewage and animal wastes (1994)
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    Nutrient cycling in agroecosystems 37 (1994), S. 1-22 
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    ISSN: 1573-0867
    Keywords: animal slurries and manures ; applications to soils ; carbon- ; nitrogen- ; phosphorus ; contamination ; crop production ; dissemination ; hazardous organics ; heavy metals ; inputs ; macro- and micronutrients ; pathogens ; sewage sludges ; survival- ; transfer- ; transport and adsorption rates in soils
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The European Community is producing annually about 300 × 106 tons of sewage sludges as well as about 150, 950,160 and 200 tons of domestic, agricultural, industrial and other wastes (street litter, dead leaves etc.). About 20–25% of the German sewage sludges, which contain in average about 3.8,1.6, 0.4, 0.6, 5.3% DM−1 N, P, K, Mg and Ca, 202, 5, 131, 349, 53, 3 and 1446 mg kg−1 DM Pb, Cd, Cr, Cu, Ni, Hg, Zn as well as ca. 37 and 5 mg kg−1 Dm polychlorinated hydrocarbons and biphenyls, are recycled annually as fertilizer. In addition environmental impacts on the arable land of Germany may derive from 76,19.2, 64.7, 33.6, 7.8 and 0.1 kg ha−1 a−1 of N, P, K, Ca, Mg and Cu added as animal manures. Besides heavy metals and hazardous organics pathogens are disseminated with organic wastes. Crop production and soil fertility generally profit from the considerable amounts of plant nutrients and carbon in sewage sludges, animal slurries and manures, but the physicochemical soil properties, the composition of microbial, faunal and plant communities as well as the metabolic processes in the soil-, rhizo- and phyllosphere are changed by organic manuring. Consequences for the soil carbon-, nitrogen-and phosphorus-cycle are discussed. Impacts of heavy metals and hazardous organics on the soil biomass and its habitat as well as on transport mechanisms and surival times of disseminated pathogens in soils are reviewed with emphasis on the German situation. A proposal for future strategies (landscape recycling) is made.
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    Results and experiences from fertilization experiments in The Netherlands (1991)
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    Nutrient cycling in agroecosystems 27 (1991), S. 107-111 
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    ISSN: 1573-0867
    Keywords: Liming ; phosphorus ; heathland ; copper ; fertilization ; forest
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Forest fertilization in the Netherlands has played an important role in the phase of afforestation of former heathlands. Research started in the early fifties, but results were not applied in practical forestry. A review is presented on forest fertilization in practice, and on the main results of the activities of De Dorschkamp on NPK fertilization, liming and micronutrients application. Attention is paid to problems which have developed during the past ten years.
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    URL: http://dx.doi.org/10.1007/BF01048613
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    Share of agriculture in nitrogen and phosphorus emissions into the surface waters of Western Europe against the background of their eutrophication (1990)
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    Nutrient cycling in agroecosystems 26 (1990), S. 253-269 
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    ISSN: 1573-0867
    Keywords: Nitrogen ; phosphorus ; sulphur ; nutrient balances ; surface waters ; North Sea ; Baltic Sea ; eutrophication ; hypertrophication ; primary production
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Dissolved inorganic nitrogen and phosphorus, their relationship to each other (DIN/DIP) as predisposing (nutrient) factors, as well as prevailing weather as a triggering factor all work together to induce the primary production and hence the eutrophication (hypertrophication) process in surface waters. Sulfate likewise is a decisive predisposing factor influencing the eutrophication process by reducing N availability but increasing P availability and thus acting towards an N limitation of the primary production. This is one of the reasons why marine (coastal) waters and estuaries often exhibit N limitation with respect to primary production, while freshwater ecosystems often tend to exhibit P limitation. Within the N and P balance of agriculture of some countries of Western Europe (Netherlands, Denmark, Switzerland, FRG, UK and Sweden for N, resp. Netherlands, FRG and GDR for P) more the level than the efficiency of the N and P applications indicates the extent of the nutrient surplus. Despite 59–73% N utilization in plant production, the rate of 13–23% for agriculture as a whole equals to the 12–21% efficiency of N use in animal production. The varying N surplus in agriculture in the separate countries of 124 to 465 kg N ha−1 a−1 is determined almost exclusively by the level of the N application and not by its efficiency. The situation is similar for P: In spite of P utilization in plant production of 59–76%, P utilization in total agriculture is only 11–38%, or comparable to the P efficiency within animal production of 10–34%. The differing P excess balance of 55 to 88 kg P2O5 ha−1 a−1 is influenced by the level of the P application. The N and P efficacy of total agriculture hence is determined almost completely by that of animal production, since 83–95% (N basis) and 76–94% (P basis) of the total plant production (on top of the nationally varying levels of N and P use via imported feeds) are fed to animals — with the low N and P utilization cited above. Agriculture's share of the N and P emissions into surface water of several countries/regions in Western Europe (FRG, Netherlands, Italy, Denmark, Switzerland, Norway) ranges from 37 to 82% resp. 27 to 38%. Its share in the flus into the North Sea catchment basin will be about 60% for N and 25% for P related only to the anthropogenic material carried by the rivers. Agriculture's share in the atmospheric N emissions into the North and Baltic Seas can be estimated at about 65% or 55%, resp. while the remaining approx. 35% or 45%, resp. are traceable primarily to anthropogenic burning processes. For agriculture the priority lies in limiting N emissions into surface water caused by leaching, erosion and NH3 emissions, and reducing P emissions mainly through soil conservation (protection against erosion) and water protection. As regards N this means a demand for comprehensive protection of groundwater and atmosphere differentiated according to the potential for losses or the risk of losses on a site, also outside the protection zones. As regards P only those areas can be included in the demand for reduction of emissions that are actually threatened by erosion or surface runoff. Plenty of short-term and long-term measures are available to agriculture to reduce N and P emissions. Especially the long-range measures (such as creating nutrient balances on farms and fields, the integration of animal and plant production, maintaining maximum livestock densities according to the ability of areas to absorb nutrients, altered feeding programs in animal nutrition, changes in livestock keeping (slurry→deep litter), increasing the internal and external recycling of N and P) are capable of bringing about a satisfactory degree of success within the next 20 to 30 years.
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    URL: http://dx.doi.org/10.1007/BF01048764
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    Land application of poultry litter and water quality in Oklahoma, U.S.A. (1994)
    Springer
    Nutrient cycling in agroecosystems 40 (1994), S. 165-173 
    Details
    ISSN: 1573-0867
    Keywords: Animal manure ; eutrophication ; ground water ; nitrogen ; phosphorus ; surface runoff
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract With the rapid growth of the poultry industry in Oklahoma, U.S.A., more litter is applied to farm land. Thus, information is required on the impact of applications on regional soil and water resources. The effect of soil and poultry litter management on nitrogen (N) and phosphorus (P) loss in runoff and subsurface flow from four 16 m2 plots (Ruston fine sandy loam, 6 to 8% slope) was investigated under natural rainfall. Plots under Bermudagrass (Cynodon dactylon) received 11 Mg litter ha−1, which amounts to contributions of approximately 410 kg N and 140 kg P ha−1 yr−1. In spring, litter was broadcast on 3 of the plots; the upper half of one and total area of the other two. One of the total-area broadcast plots was tilled to 6 cm, the other remained as no till. The fourth plot served as a control. Relative to the control, litter application increased mean concentrations of total N and total P in runoff during the 16-week study for no-till (15.4 and 5.8 mg L−1) and tilled treatments (16.7 and 6.1 mg L−1). However, values for the half-area application (5.6 and 2.0 mg L−1) were similar to the control (5.7 and 1.3 mg L−1). Interflow (subsurface lateral flow at 70 cm depth) P was not affected by litter application; however, nitrate-N concentrations increased from 0.6 (control) to 2.9 mg L−1 (no till). In all cases, 〈 2 % litter N and P was lost in runoff and interflow, maintaining acceptable water quality concentrations. Although litter increased grass yield (8518 kg ha−1) compared to the control (3501 kg ha−1), yields were not affected by litter management. An 8-fold increase in the plant available P content of surface soil indicates long-term litter management and application rates will be critical to the environmentally sound use of this nutrient resource.
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    URL: http://dx.doi.org/10.1007/BF00750462
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    Future directions for agricultural phosphorus research (1995)
    Springer
    Nutrient cycling in agroecosystems 41 (1995), S. 167-178 
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    ISSN: 1573-0867
    Keywords: phosphorus ; workshop ; environment ; review
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A workshop was held in 1990 in Muscle Shoals, Alabama to discuss current and future research on phosphorus in agriculture. Twenty four presentations were given in areas ranging from basic to applied research. For five of the research areas presented at the workshop, this paper presents a literature review, a review of presentations at the workshop, and a discussion of future research ideas.
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    URL: http://dx.doi.org/10.1007/BF00748306
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    Coordinated phosphorus research within a network of six European institutions (1995)
    Springer
    Nutrient cycling in agroecosystems 43 (1995), S. 109-115 
    Details
    ISSN: 1573-0867
    Keywords: phosphorus ; European network ; maintenance fertilization ; fixation capacity ; comparison of methods
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract After three years of a research network project on mineral phosphorus fertilization including five experimental fields located in Europe the first results are discussed. Crop response was very significant to TSP application in the alluvial calcareous polder soil of Netherlands, and in the brown silty acid soil of Scotland, both having a low level of P availability and a high fixation capacity. In the alluvial sandy loam on chalk in England, a response was observed to the first fertilization level equal to the previous crop export of phosphorus. In the brown sandy-silty soil on sand in Germany the highest rate of TSP led to a response in the third year. No effect on the final yields was observed in the brown silt loam of Belgium characterised by a textural B horizon with a high P fixation capacity. The critical values for phosphorus fertilization are discussed as the amount of P needed to maintain a target value of soil phosphorus. Concerning the supply of the different soils, no balance was reached in the Dutch and Scottish soils, a steady state was reached in the English soil with the return of the previous crop removal and the critical value for P was lower than the return of the previous crop export in the German and Belgian soils. According to the eight methods of P determination compared in the network, the P contents in the plow layer were raised in the soils of Netherlands, England and Scotland. They remained at the same level or fluctuated depending on the soil testing methods in Germany and in Belgium. High correlations exist between the different methods used in routine analysis, except for the calcium cloride and calcium acetate lactate method. Annual fluctuations in the soil P were detected at different depths depending on analytical methods and need further research.
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    URL: http://dx.doi.org/10.1007/BF00747689
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    Plant biomass and fruit yield induction by Ti(IV) in P-stressed pepper crops (1995)
    Springer
    Nutrient cycling in agroecosystems 43 (1995), S. 131-136 
    Details
    ISSN: 1573-0867
    Keywords: phosphorus ; titanium ; fertilizer efficiency ; plant nutrition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract To study the titanium effect on P nutrition, a greenhouse experiment withCapsicum annuum L., cv. Bunejo plants growing under differential P fertilization was conducted. All the plants were grown under identical conditions and they only differred in the P fertilization and in Ti supply. Plant biomass production of the Ti-untreated plants was affected by the diminution of the P-feed, but the plants growing under the lowest P supply did not showed any deficiency symptom during the crop cycle. All the Ti-treated plots showed a significative increase of the plant biomass against their corresponding untreated references. The biomass enhancement was mainly caused by the increase of the fruit yield with an absolute enhancement of 62% in the plants growing under the lowest P feed, and of 45% in the plants with a complete P support.
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    URL: http://dx.doi.org/10.1007/BF00747692
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    Phosphate enrichment in the sandy loam soils of West-Flanders, Belgium (1995)
    Springer
    Nutrient cycling in agroecosystems 43 (1995), S. 209-215 
    Details
    ISSN: 1573-0867
    Keywords: phosphorus ; saturation ; inventory ; leaching ; eutrophication
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The last three decades, pig breeding has evolved towards a specialised, large scaled, land independent bio-industry in the province of West-Flanders. Subsequently, in certain regions, very high amounts of liquid pig manure are produced each year. This pig slurry is used as a fertilizer at a rate which very often exceeds normal agricultural practices. Because of the nonequilibrium between the phosphorus crop requirements and the P-inputs, phosphates accumulate in the soil. However, the phosphate sorption capacity of a soil is limited. Once the sorption capacity is exceeded, phosphates will start leaching through the soil profile. Since, during winter, in these areas, the groundwater table is situated at a depth of less than 1.0 m, phosphate breakthrough might take place. In the sandy loam soil region (± 1000 km2) of the province, an inventory of the P status of the soil was made. The region was sampled according to a regular grid with 2 km intervals. At random, some sample points were only 500 m apart. This resulted in a total of 296 samplings. In view of fertilizer recommendations, lactate extractable P of the plough layer (0-30 cm) was determined. A maximum value of 101 mg P 100 g−1 of air dry soil, a minimum value of 6 mg P 100 g−1 and a median value of 31 mg P 100 g−1 were found, indicating that for half of the spots monitored, the P status of the soil is high to very high. An oxalate extraction was done to investigate the phosphate saturation of the soil profile (0-90 cm). Based on a critical phosphate saturation degree of 30%, more than half of the soil profiles are phosphate saturated. Phosphate leaching at a rate higher than 0.1 mg ortho-P 1−1 at a depth of 90 cm can be expected. Therefore, a restriction of the P fertilization should be highly recommended. The geostatistical processing of the data using block kriging resulted in a spatial continuous estimate of the phosphate saturation degree. A good agreement was found between the pig density and the phosphate saturation degree of the soil profile.
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    URL: http://dx.doi.org/10.1007/BF00747704
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    Response of ensete (Ensete ventricosum W.) to mineral fertilizers in southwest Ethiopia (1994)
    Springer
    Nutrient cycling in agroecosystems 37 (1994), S. 107-113 
    Details
    ISSN: 1573-0867
    Keywords: Ensete ventricosum ; fertilizer response ; nitrogen ; phosphorus ; potassium ; sulphur ; starch
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Ensete (Ensete ventricosum W. Cheesm.) is a root crop which stores starch in the root and in the lower part of the stem. It is grown in the southwest of Ethiopia and due to its drought resistance, it is of outstanding importance for the supply of food to the local population. Until now virtually nothing is known about the response of Ensete to fertilizer application. Field trials carried out on three representative soils in Ethiopia showed that Ensete biomass yields were increased significantly on all three soils by nitrogen and phosphorus application. Potassium had only marginal effect on biomass growth but favourably influenced starch production. Sulfate application had no major impact on growth and starch yield. The yield response was well related to the level of available nutrients in the soil, as determined by electroultrafiltration (EUF). Leaf analysis provided preliminary evidence that optimum levels of N, P, and K may be 3.8%, 0.3%, and 4.8%, respectively.
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    URL: http://dx.doi.org/10.1007/BF00748551
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    Estimating nutrient surplus and nutrient use efficiency from farm characteristics (1995)
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    Nutrient cycling in agroecosystems 45 (1995), S. 221-233 
    Details
    ISSN: 1573-0867
    Keywords: fertilizer recovery ; modelling ; nitrogen ; nutrient efficiency ; nutrient surplus ; phosphorus ; Poland
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Research on nutrient losses from agricultural systems should try to relate these losses to farm characteristics. This was done for private farms in two districts in Poland. Using data from a farm survey, nutrient surpluses and Nutrient Use Efficiency (NUE, defined as the ratio of outgoing and incoming nutrients) were calculated for nitrogen and phosphorus. Both nutrient surplus and NUE are relatively high. A model was developed to estimate surpluses and NUE from farm characteristics like location, farm size, fertilizer application level, animal density, grass production and sugar beet or potato area. The results of the model are satisfying for nutrient surplus (R2=0.9) and nitrogen NUE (R2=0.4). Estimation of phosphorus NUE was not satisfactory. High surpluses are associated with high fertilizer applications, high animal density and high grass production while an increasing share of sugar beets leads to lower surpluses. A high nitrogen NUE is associated with low fertilizer applications, low animal density and little grass production, and with a high sugar beet area share. Results suggest that, with exception of sugar beet, fertilizer recovery in Poland is very low. Sugar beet, however, combines high fertilizer applications with low surpluses and high NUE. The outcome of the model can be used in the design of environmental policies. The paper ends with some remarks on the type of measures that can be taken, and the effects these will have on private farms in Poland.
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    URL: http://dx.doi.org/10.1007/BF00748593
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    Influence of co-granulated nutrients and granule size on plant responses to elemental sulfur in compound fertilizers (1996)
    Springer
    Nutrient cycling in agroecosystems 46 (1996), S. 81-90 
    Details
    ISSN: 1573-0867
    Keywords: elemental sulfur ; granule size ; nitrogen ; phosphorus ; potassium ; S oxidation ; sulfur fertilizers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Experiments were undertaken to determine the effect of granule size and nutrients in granulated compound fertilizers fortified with finely divided elemental sulfur (So) on the rate of So oxidation. In one experiment, So was banded together with or apart from triple superphosphate (TSP) while in two others, So was granulated with nutrient and inert carriers. A fourth experiment examined response to S in an So-fortified TSP from a range of granule sizes. Response and, in some cases, So recovery (using 35S labels) by test crops (maize, wheat, upland rice) was measured. In all experiments, P mixed with So increased plant growth and S recovery above treatments in which P and So were physically separated. There was however, no effect of distance of separation on S recovery. In one experiment, N as urea and N and P as diammonium phosphate (DAP) were also found to enhance response to So although to a lesser degree than P alone. These observations were attributed to a nutritional requirement of So-oxidizing microorganisms for P and N. Granulation of So with carriers also influenced oxidation rate, as inferred from the fertilizer S recovery. For a given So concentration, the effect was inversely proportional to the mean diameter of granules. It is shown that this relationship can be explained if one assumes that So particles in granules collapse into a fixed number of aggregates per granule irrespective of granule size when the soluble nutrient carrier dissolves and diffuses away from the point of application.
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    URL: http://dx.doi.org/10.1007/BF00210226
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    Fertilizer inputs, nutrient balance and soil nutrient supplying power in intensive, irrigated rice system. III. Phosphorus (1996)
    Springer
    Nutrient cycling in agroecosystems 46 (1996), S. 111-125 
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    ISSN: 1573-0867
    Keywords: long-term experiments ; phosphorus ; rice ; nutrient balance ; phosphorus uptake ; fertilizer P response ; soil testing ; ion-exchange resin ; phosphorus supplying capacity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Data from long-term experiments at 11 sites in Asia with a wide range of nutrient input treatments and yield levels were used to quantify crop P requirements of rice (Oryza sativa L.) and the P balance in intensive, irrigated rice systems. Uptake of 1.8–4.2 kg P was required to produce one ton of grain yield. Physiological P use efficiency varied between 220 to 900 kg grain kg P-1. Without added P, there was a net loss of 7 to 8 kg P ha-1 per crop; with added P there was a net gain of 4 to 5 kg P ha-1 per crop. Phosphorus adsorption kinetics on mixed-bed ion-exchange resin capsules provided an integrative measure of soil P status, P diffusion, and acid-induced P solubilization. The resin capsule was a sensitive tool to characterize buildup or depletion of soil P as a result of different P balances. Both Olsen-P and the resin capsule were suitable methods to predict P uptake of tropical lowland rice. It is hypothesized that both methods measure a similar soil P pool which is soluble under alkaline, aerobic conditions but transformed into acid-soluble P froms as a result of submergence and reduction. Present recommendations for P fertilizer use on rice of 20–25 kg P ha-1 are adequate to maintain yields of 5–6 t ha-1, but sustaining higher yields of 7–8 t ha-1 will require farm-specific management strategies based on knowledge of the long-term P balance and soil P-supplying capacity.
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    URL: http://dx.doi.org/10.1007/BF00704311
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    Characterization of soil-fertilizer P reaction products and their evaluation as sources of P for gram (Cicer arietinum L.) (1996)
    Springer
    Nutrient cycling in agroecosystems 46 (1996), S. 71-79 
    Details
    ISSN: 1573-0867
    Keywords: ammonium poly-phosphate ; diammonium orthophosphate ; fertilizer reaction ; gram ; Indian soils ; phosphorus ; P uptake ; single superphosphate ; triple superphosphate ; yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Laboratory studies on the characterization of soil-fertilizer P reaction products were carried out by reacting three-soils occurring in a toposequence in the plateau region of Bihar (India) with saturated solutions of diammonium orthophosphate (DAP), triple superphosphate (TSP) and ammonium polyphosphate (APP) for 1 hour and 24 hours. The reaction products (precipitates) formed in the solutions after 120 days of incubation were isolated and identified through X-ray diffraction technique. Results indicate the formation of Brushite [CaHPO4 · 2H2O, Strengite (FePO4 · 2H2O), Variscite (AIPO4 · 2H2O) and Fe4(P2O7)3 as major soil-fertilizer P reaction products in these soils with ortho-and polyphosphates as source of phosphorus. Pot cultures were used to evaluate the relative efficiency of reaction products (Struvite, Brushite, Variscite and Strengite), orthophosphates (DAP and SSP) and polyphosphate (APP) as sources of P for gram (Cicer arietinum L.) in a typical acid soil. Results indicate significant response of gram to different sources and level of added P. The dry weight and P uptake at 0, 6 and 12 mg P kg-1 soil were 0.406, 0.519 and 0.609 (g pot-1); and 0.289, 0.428 and 0.575 (mg P pot-1), respectively. Among the sources , struvite proved to be superior or equally effective as APP, DAP or SSP as sources of P for gram. Uptake of P also varied significantly with different P sources and levels of P application. Strengite was least effective in enhancing yield and P uptake by the crop.
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    Comparison of resin beads and resin membranes for extracting soil phosphate (1995)
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    Nutrient cycling in agroecosystems 44 (1995), S. 1-8 
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    ISSN: 1573-0867
    Keywords: aerobic incubation ; cation-anion-exchange resin ; phosphorus ; resin beads ; resin membranes ; suspension incubation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Six Portuguese soils of varying P sorption capacity were incubated aerobically at 30° C without and with added P in order to give 0.1.mg P L−1 in the soil solution. Two methods of measuring extractable P were compared: (i) mixed-bed cation-anion-resin beads in bags and (ii) a simpler method with anion-resin membrane only. The bag method extracted about twice and 1.5 times as much as the strip method, respectively, without and with added P. The relationships were much closer after one extraction for 2 hours (r = 0.982, p 〈 0.01) instead of the cumulative extraction of 24 hours (r = 0.635,p 〉 0.05.). P recovery after incubation was inversely related to some soil properties as organic matter, buffer capacity, selective dissolution Al forms (Alox and Ald) and P sorption. It is suggested that the simpler resin membrane method is more adequate to assess P for many studies of P reaction with soil. A simpler incubation method was tried, consisting of incubation as a soil suspension in water at a high temperature (50° C). The results suggested that this method gave similar results to aerobic incubation, with the advantage that there was no need to measure the required and final water contents of incubated soil.
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    Effects of temperature on nutrient release from slow-release fertilizers (1996)
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    Nutrient cycling in agroecosystems 46 (1996), S. 179-187 
    Details
    ISSN: 1573-0867
    Keywords: electrical conductivity ; leaching ; nitrogen ; pH ; phosphorus ; potassium ; release pattern ; slow-release fertilizers ; temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract We studied the effect of temperature on the release of N, P, and K from slow-release fertilizers (SRF). The study was conducted in micro-lysimeters filled with moist peat medium. Increasing the temperature from 4 to 12°C slightly increased N release from three different slow-release N (SRN) carriers with different particle sizes and coating thicknesses. At 21°C the rate of release was significantly different than the other two temperatures. Urea formaldehyde (UF), sulphur coated urea (SCU) and coated calcium nitrate (CCN), incubated in sphagnum moss peat, released between 3 and 20% of the applied N in six weeks. For eight synthetic and organic NPK carriers, the release pattern was similar to UF and SCU. However, the leaching losses of N from the NPK fertilizers were up to twenty times more than for the SRN products. Except for Osmocote® and Duna, which released 30–40% of the applied N as mineral-N within six weeks, all other slow-release and slowly mineralized NPK carriers acted like readily water-soluble compound NPK. Temperature did not affect the nutrient release from NPK fertilizers.
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    Leaching of nitrogen and phosphorus from rural areas to surface waters in the Netherlands (1998)
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    Nutrient cycling in agroecosystems 50 (1998), S. 321-324 
    Details
    ISSN: 1573-0867
    Keywords: nutrient modelling ; leaching ; nitrogen ; phosphorus ; schematization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In context of preparing the Fourth National Policy Document on Water Management in the Netherlands effects of different scenarios of fertilizer management on nitrogen (N) and phosphorus (P) leaching from rural areas into Dutch surface waters were analyzed. The manuscript offers insight into the model instrument that is used to simulate the different scenarios. Main parts of the modelinstrument are: a procedure to schematize the Netherlands in horizontal areal units, field scale mechanistic models for water and nutrient behaviour in the soil and an empirical model for fertilizer additions.
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    URL: http://dx.doi.org/10.1023/A:1009773202654
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    Changes in fertilizer and manurial practices during 1960–1990: implications for N and P inputs to the Ythan catchment, N.E. Scotland (1998)
    Springer
    Nutrient cycling in agroecosystems 52 (1998), S. 19-29 
    Details
    ISSN: 1573-0867
    Keywords: agriculture ; catchment ; fertilizer ; historical ; manure ; nitrate ; phosphorus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A suggested increase in the growth of macrophytic algae within the Ythan estuary (N.E. Scotland) over recent years has been linked to the increased amounts of nitrogen in the form of NO3–N entering the estuary from the river. The increased NO3 concentration in the river has been associated with recent changes in farming practices in this predominantly agricultural catchment. Terrestrially derived phosphorus is also considered to contribute increasingly to eutrophication of fresh waters. Historical agricultural census data together with appropriate surveys of fertilizer practice were used to calculate the total quantities of fertilizer and manure derived N and P applied annually over the wholeYthan catchment during the period 1960 – 1990. While the total agricultural land area has remained similar, significant changes in cropping practice have occurred. In particular, a greater proportion of land is given to autumn sown crops while the area of grassland has declined. These changes in farming practice are associated with differences in both the total amounts and timing of fertilizer applied. The use of inorganic N in the catchment has trebled since 1960 and is currently approximately 6400 tonnes (104 kg N/ha). The use of P has decreased by more than a quarter to 1274 tonnes (21 kg P/ha) over a similar time period. There has been no obvious change in total quantity of N and P derived from animal manures, estimated to be 44 and 11 kg per ha, respectively, when averaged over the area of agricultural land. Cattle and sheep numbers have remained relatively constant and together account for approximately 80% of the manure N and 70% of the manure P produced annually. However, poultry have declined by 70% since 1960 while pig numbers have increased six-fold. The average annual application rate of manure derived N over the whole catchment (44 kg/ha) is considerably below that proposed at the farm scale in the EC Nitrate Directive (210–170 kg/ha). However, on a local scale difficulties may arise for large manure producing concerns such as dairy or pig units.
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    Controlling soil water content in fertiliser dissolution experiments (1999)
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    Nutrient cycling in agroecosystems 55 (1999), S. 7-14 
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    ISSN: 1573-0867
    Keywords: fertiliser formulation ; nutrients ; phosphorus ; relative humidity ; soil moisture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Phosphorus lost in runoff from agricultural land leads to the enrichment of surface waters and contributes to algal blooms. Fertilisers are one source of this P. To compare the water available P of different fertiliser formulations in the laboratory it is necessary to control environmental conditions, temperature, relative humidity and soil water content, prior to simulating rainfall. Two chambers were designed in which relative humidity and soil water content were controlled using salt solutions. An initial design comprising a sealed chamber with three layers of soil samples over a salt bath was found to be inferior to a single layer design. The changes in water content of soil samples were used to test the single layer chamber in a constant temperature environment (15 °C) using a saturated KCl solution (90% relative humidity). Based on the final soil water content of the samples, the spatial variation within the chamber was within tolerable limits. The single layer chamber was used for a simulation experiment comparing the water available P of two commercial fertilisers. Using a saturated resorcinol solution (95% relative humidity) soil samples were equilibrated at 15 °C for 21 days, fertiliser added, and the water available P measured up to 600 h after fertiliser application. The results indicate that the amount of water available P was related to the fertiliser compound and exponentially related to the time since fertiliser application. It was concluded that the single layer chamber is suitable for controlling relative humidity and soil water content in trials such as these where the water available P of fertilisers are being compared.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009816716466
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    Transfers of phosphorus within three dairy farming systems receiving varying inputs in feeds and fertilizers (1999)
    Springer
    Nutrient cycling in agroecosystems 55 (1999), S. 63-75 
    Details
    ISSN: 1573-0867
    Keywords: dairy systems ; feeds ; fertilizers ; phosphorus ; P surplus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Inputs of phosphorus (P) above requirements for production on dairy farms lead to surplus P with increased risk of P transfer in land run-off to surface waters causing eutrophication. The impact of reducing surplus P inputs in purchased feeds and fertilizers on milk and forage production was investigated in a comparison of three dairy farm systems on chalkland soils in southern England over a 3-year period. In accordance with current commercial practice, no attempt was made to regulate P inputs in system 1, which accumulated an average annual surplus of 23 kg P ha-1. Progressive reductions in purchased feed and/or fertilizer inputs into systems 2 and 3 decreased surplus P to 17 and 3 kg ha-1, respectively, without apparently limiting either milk or herbage dry matter production. The estimated reduction in faecal P output from system 3 cows fed a low P diet compared to system 1 cows fed a high P diet was 26%. Milk P concentrations significantly (P 〈0.001) increased in systems 2 and 3 which included maize in the diet. Output of P in milk and meat products, as a proportion of the total dietary P inputs, increased from 28% in system 1 to 36% in system 3. Surplus P was greatest in continuous maize fields receiving both dairy manure and starter P fertilizer. Withholding P fertilizer in system 3 did not reduce P offtake in cut herbage on soils of moderate P fertility. Total annual losses of P in storm run-off and leaching were no greater than annual inputs of P from the atmosphere (0.5 kg ha-1). The results indicate there is scope to reduce surplus P on commercial dairy farms without sacrificing production targets at least in the short term. Purchased feeds are the largest of the P inputs on intensive dairy farms, yet these are rarely quantified on commercial holdings.
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    URL: http://dx.doi.org/10.1023/A:1009860915462
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    Applications of poultry litter and triple superphosphate fertilizer to a sandy soil: effects on soil phosphorus status and profile distribution (1999)
    Springer
    Nutrient cycling in agroecosystems 54 (1999), S. 233-242 
    Details
    ISSN: 1573-0867
    Keywords: leaching ; phosphorus ; poultry litter ; soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract To determine P loadings, added through poultry litter, sufficient to cause downward movement of P from the cultivated layer of a sandy soil, six rates of poultry litter were applied annually for four years to a site in central England. (total loading 0 – 1119 kg P ha-1). A single extra plot also received an extra 1000 kg ha-1 as triple superphosphate (TSP; total loading 2119 kg P ha-1) and three other treatments received 200 – 800 kg ha-1 P as TSP only. Annual soil sampling in 30-cm increments to 1.5-m depth provided information on P build-up in the topsoil and P movement to depth. There were strong linear trends between P balance (P applied – P removed in crops) and total P, Olsen bicarbonate extractable P and water-soluble P in the topsoil. Phosphorus from TSP and poultry litter fell on the same regression lines, suggesting that both would be equally effective as fertilizer sources. We calculated that 100 kg ha-1 surplus total P would increase the Olsen extractable P content by c. 6 mg kg-1 and the water-soluble P by c. 5 mg kg-1. Thus, relatively large amounts of P would need to be applied to raise soil P status. We found some evidence of P movement into the soil layers immediately below cultivation depth. However, neither soil sampling nor soil solution extracted through Teflon water samplers showed evidence of movement into the deep subsoil (1 m) despite large P loadings.
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    URL: http://dx.doi.org/10.1023/A:1009744706679
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    Inorganic phosphorus and manure effects on bahiagrass production on a Spodosol (1999)
    Springer
    Nutrient cycling in agroecosystems 54 (1999), S. 259-266 
    Details
    ISSN: 1573-0867
    Keywords: bahiagrass ; manure ; pasture fertilization ; phosphorus ; phosphorus cycling ; Spodosol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Bahiagrass (Paspalum notatum Flugge) pasture fertilization recommendations have traditionally been based upon clipping studies. Inclusion of P from manure, not originally considered when P recommendations were developed for pastures, may minimize the need for P fertilization without reducing bahiagrass production or P uptake. The objective of this research was to determine if manure contributes greatly to the P crop nutrient requirement. A 2-year field study utilized a factorial arrangement of 0 and 6.9 Mg air-dried manure ha-1 with 0, 17, 34, 51, and 68 kg inorganic P ha-1 from triple superphosphate to evaluate bahiagrass yield, root distribution, and P uptake response on a Myakka fine sand (sandy, siliceous, hyperthermic Aeric Alaquod). Because air-dried manure was used in the field study, a greenhouse study was employed to confirm that there were no differences in bahiagrass yield or P uptake from either air-dried or fresh cattle (Bos spp.) manure sources. There were no manure or manure by P interaction effects on yield or P uptake of bahiagrass indicating that manure source did not effect grass production in the greenhouse. In the field study, bahiagrass roots were distributed into the Bh horizon, and the Bh horizon had at least four times more Mehlich-1 extractable P than that of the Ap horizon. This horizon was most likely acting as a main source for P-uptake by the grass. This observation was further confirmed by no yield response to levels of inorganic P application in 1989. A linear-response-and-plateau (R2=0.196) relationship with a critical point of 15.4 kg P ha-1 was found in 1990. Bahiagrass yield and P uptake were not dependent on P fertilization, either from manure or inorganic P, due to the availability of P from the Bh horizon.
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    URL: http://dx.doi.org/10.1023/A:1009831011649
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    Effect of P fertilizer on alleviating chloride toxicity in wheat (1985)
    Springer
    Nutrient cycling in agroecosystems 6 (1985), S. 171-176 
    Details
    ISSN: 1573-0867
    Keywords: Chloride ; phosphorus ; salinity ; wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A pot study with four levels each P (control, 6.5, 13.0, 19.5 mg kg−1) and Cl− in irrigation water (control, 30, 60, 90me l−1) was carried out to test Cl− and P interaction on wheat. It has been found that optimum P nutrition alleviates the toxic effect of excess Cl−. Highest P rate resulted in a significant yield increase upto a Cl− level of 60me l−1. Cl− depressed P content in the plant only at a Cl− level of 90me l−1, while P rates had no major impact on the Cl− concentration in the plant. Lower Cl− concentration at higher P rates are rather a dilution effect than an antagonistic one. With optimum P supply higher Cl− contents in the plants were tolerated than with a low P supply.
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    URL: http://dx.doi.org/10.1007/BF01051011
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  • 90
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    Tracking phosphorus patterns in mango (Mangifera indica L) and possible relations to floral induction (1985)
    Springer
    Nutrient cycling in agroecosystems 6 (1985), S. 225-234 
    Details
    ISSN: 1573-0867
    Keywords: bark ; floral induction ; leaves ; mango ; phosphorus ; shoots ; stems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Phosphorus concentration was tracked in four types of mango shoots. The mean phosphorus concentration was highest in laterals existing on shoots which had either flowered or fruited in the preceding season, followed by young flush arising in July, laterals existing on shoots which did not flower or fruit in the preceding season and shoots which did not flower or fruit in the preceding season and having further extension of growth. A higher percentage of floral induction was noted in the laterals on shoots which had either flowered or fruited in the preceding season. The study clearly showed the association of availability of phosphorus with floral induction.
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    URL: http://dx.doi.org/10.1007/BF01048797
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    Response of two okra (Abelmoschus esculentus L. Moench) varieties to fertilizers: Yield and yield components as influenced by nitrogen and phosphorus application (1985)
    Springer
    Nutrient cycling in agroecosystems 6 (1985), S. 257-267 
    Details
    ISSN: 1573-0867
    Keywords: nitrogen ; okra (Abelmoschus esculentus L. Moench) ; phosphorus ; yield ; yield components
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The response of two okra (Abelmoschus esculentus L. Moench) varieties (‘White velvet’ and ‘NHAE 47-4’) to fertilization in northern Nigeria was examined using four rates of nitrogen (0, 25, 50 and 100 kg ha−1) and three rates of phosphorus (0, 13 and 26 kg ha−1). Nitrogen application significantly increased green pod yield, pod diameter, number of fruits per plant, number of seeds per pod and pod weight. Application of phosphorus also significantly increased green pod yield, pod number and number of seeds per pod. The two varieties responded to nitrogen application differentially with respect to green pod yield. For optimum green pod yield of ‘White velvet’ 35 kg N ha−1 is suggested while for variety ‘NHAE 47-4’, N fertilization can be increased to 70 kg ha−1. There was no differential response of varieties to phosphorus fertilization for green pod yield; however, the application of 13 kg ha−1 enhanced the performance of both varieties.
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    URL: http://dx.doi.org/10.1007/BF01048799
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    A conceptual model for initial and residual responses to phosphorus fertilizers (1985)
    Springer
    Nutrient cycling in agroecosystems 6 (1985), S. 131-138 
    Details
    ISSN: 1573-0867
    Keywords: modelling ; phosphorus ; residual value
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A model is formulated to describe the amount of effective phosphorus in soil. For a source that is immediately fully effective only three parameters are required — the amount of effective phosphorus initially present, the proportion of phosphorus remaining effective after each year, and a parameter which determines the lower limit for the amount of effective phosphorus. An extension of the model to sources that release their phosphorus slowly requires one further parameter — the fraction of such phosphorus released each year. The effective phosphorus in soil is then related to yield using the Mitscherlich equation. The model gave a good description of the growth response ofStylosanthes humilis to superphosphate and calcined Christmas Island C-grade phosphate (CCICP) over three years on a red earth at Katherine, N.T. Furthermore, it enabled a quantitative assessment to be made of the residual value of the CCICP that was not achieved in an earlier analysis of the data.
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    URL: http://dx.doi.org/10.1007/BF01051007
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    Fertilizer and liming value of lime-treated sewage sludge (1986)
    Springer
    Nutrient cycling in agroecosystems 8 (1986), S. 313-328 
    Details
    ISSN: 1573-0867
    Keywords: fertilizers ; lime ; lucerne ; nitrogen ; phosphorus ; sewage sludge
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A field experiment was conducted with lucerne on a strongly acidic and phosphorus deficient soil to determine the liming and phosphorus and nitrogen fertilizer value of an undigested, lime-treated sewage sludge. The results are presented in terms of calculated combinations of lime, nitrogen and phosphorus fertilizer required to obtain the same lucerne yield (or soil pH or extractable phosphorus level) as achieved with 5 or 10 t ha−1 of dried sludge. The sludge was a good source of lime, phosphorus and nitrogen. The sludge phosphorus was 49% as effective as the fertilizer phosphorus in raising extractable phosphorus in the soil to the level required for crop growth. The calcium carbonate of the sludge raised soil pH more effectively than agricultural lime, probably because of finer particle size in the former. It was not possible to achieve the yield obtained with 25 t ha−1 of sludge with combinations of agricultural lime, and nitrogen and phosphorus fertilizers at high rates of application. This was attributed to the effects of the sludge on improving soil physical properties.
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    URL: http://dx.doi.org/10.1007/BF01048634
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    Comparisons of the fertilizing and liming properties of lime-treated sewage sludge with its incinerated ash (1986)
    Springer
    Nutrient cycling in agroecosystems 9 (1986), S. 187-197 
    Details
    ISSN: 1573-0867
    Keywords: lime ; lucerne ; nitrogen ; phosphorus ; ryecorn ; ryegrass ; sewage sludge ; sewage ash
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Two field experiments were conducted to compare the fertilizing and liming properties of dried lime-treated sewage sludge with its incineration product (ash). One experiment used a mixture of ryecorn and ryegrass on a relatively fertile soil and the other lucerne on a strongly acidic and phosphorus deficient soil. The first harvest of the ryecorn-ryegrass experiment showed small but significant linear responses in dry matter yield to both ash and sludge. Ash applications did not affect foliage nitrogen and phosphorus concentrations, or uptakes, but sludge applications increased these significantly. Sludge also increased the concentrations of K, S, Mg, Cu and Zn but ash only increased the concentrations of S and Mg. At the second harvest (ryegrass) 5 t ha−1 of sludge increased dry matter yield and foliage nitrogen and phosphorus concentrations whereas ash had no effect. Levels of phosphorus extracted from the soil were increased by both amendments but the sludge was much more effective than the ash. Both ash and sludge raised soil pH. In the lucerne experiment comparisons between sludge and ash were calculated from response surfaces fitted to the data which showed marked increased in soil pH and dry matter yield. Sludge markedly increased extractable phosphorus whereas ash had no effect. The sludge was 22% as effective as ash in raising soil pH to 6.5. The amounts of ash required to obtain the same yield as 10 t ha−1 of sludge were 5.78, 12.78 and 6.39 t ha−1 respectively for three successive harvests. These results and those for foliage concentrations of nitrogen and phosphorus were also ascribed to the much greater availability of the sludge phosphorus than the ash phosphorus, and the presence of nitrogen in the sludge but not in the ash.
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    URL: http://dx.doi.org/10.1007/BF01050345
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    Fertilization of tropical rice: A case study on Bangkok plain (1986)
    Springer
    Nutrient cycling in agroecosystems 10 (1986), S. 97-112 
    Details
    ISSN: 1573-0867
    Keywords: fertilizer ; nitrogen ; phosphorus ; plant analysis ; nutritional status
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract This study consisted of a survey on the nutritional status of rice plants in relation to nutrient application and yield in 70 farmers' fields in four provinces of Bangkok plain during the 1977 wet season. In addition a series of fertilizer experiments were carried out on rice experimental stations in the same provinces to study yield response to N and P fertilization and to develop a fertilizer recommendation system based on plant analysis. The average grain yield in the survey was 3.2 t ha−1 and the early (high yielding varieties), medium (local) and late maturity (local) types yielded 3.3, 2.8 and 3.0 t ha−1, respectively. The average amount of fertilizers applied to these maturity types were 33, 15 and 7 kg N ha−1 and 15, 8 and 6 kg P ha−1, respectively. Regression analysis indicated only a slight correlation between yield and any level of fertilizer application. On experimental stations yields over 6 t ha−1 were obtained with applications of N over 100 kg ha−1 and P over 22 kg ha−1. Evaluation of nutritional status of plants based on plant analysis showed that in all provinces there were strong and widespread nutrient deficiences primarily of N and secondarily of P, and possibly of some other nutrients. Fertilizer application based on plant analysis gave high yield responses. It was concluded that the major constraints of yield on Bangkok plain are too low fertilizer application especially of N, and unbalanced fertilization of N and P.
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    URL: http://dx.doi.org/10.1007/BF01074365
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    Mathematical algorithm for effective phosphorus determination in a rice based cropping system (1988)
    Springer
    Nutrient cycling in agroecosystems 18 (1988), S. 57-61 
    Details
    ISSN: 1573-0867
    Keywords: Cropping system ; modelling ; phosphorus ; residual value ; rice based ; sources of P
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A mathematical model similar to the one suggested by Probert [3] is used to calculate effective phosphorus in two rice crops followed by green gram. The effective phosphorus values are then related to dry matter yield, grain yield and phosphorus uptake in the three crops using linear and Mitscherlich equations.
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    URL: http://dx.doi.org/10.1007/BF01064178
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    Fertilization of millet cv. Souna III in Senegal: dry matter production and nutrient uptake (1993)
    Springer
    Nutrient cycling in agroecosystems 35 (1993), S. 217-226 
    Details
    ISSN: 1573-0867
    Keywords: calcium ; dry matter distribution ; fertilizer ; harvest index ; magnesium ; manure ; millet ; nitrogen ; nutrient uptake ; phosphorus ; potassium ; Senegal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In a fertilizer and manure experiment, millet was grown under four treatments (no fertilizer or manure, farmyard manure, chemical fertilizer, and both). Grain yield and total aboveground biomass production of the unfertilized plot were relatively high. The observed differences in total dry matter production must be attributed to differences in nutrient availability, as amount of rainfall and its distribution were favourable. Results show only small differences in distribution of dry matter among the various plant organs between the best and the non-fertilized treatments. Nutrient supply from natural sources, defined as crop content of N, P, and K at maturity without fertilizer application, amounted to 104, 16 and 103 kg ha−1, respectively, which are very high values. Total uptake of calcium and magnesium is related to that of potassium, as the combined content of these three elements is linearly related to total aboveground biomass production. Minimum removal of nitrogen and phosphorus per ton grain dry matter amounts to 29 and 4kg, respectively, and 9 kg potassium per ton total aboveground dry matter. A possible double function of phosphorus as element of structural biomass and for maintenance of electro-neutrality is discussed.
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    URL: http://dx.doi.org/10.1007/BF00750640
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    Fertilizers and eutrophication in southwestern Australia: Setting the scene (1993)
    Springer
    Nutrient cycling in agroecosystems 36 (1993), S. 95-103 
    Details
    ISSN: 1573-0867
    Keywords: eutrophication ; phosphorus ; fertilizer ; Peel-Harvey estuary ; algal blooms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract An excess of plant nutrients has caused serious eutrophication in aquatic ecosystems of southwestern Australia manifested by excessive growth and accumulation of green and bluegreen algae. Phosphorus is generally the limiting nutrient for algal growth and phosphatic fertilizers applied to nutrient-deficient, leaching, sandy soils are the main source of P, supplemented by rural industry point sources. Nitrogen is the limiting nutrient in marine embayments with little drainage from the land. Measures to reduce the load of P delivered to drainage include basing fertilizer application rates on soil testing for P and the use of less soluble P fertilizers. Catchment management plans are being implemented with community involvement to reduce P loads and maintain agricultural production. This introductory paper reviews the history of eutrophication in southwestern Australia and of studies into its causes, principally in the large Peel-Harvey estuary. It briefly summarises other papers in this special issue concerned with different aspects of the problem: how to fertilize the land without causing eutrophication.
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    URL: http://dx.doi.org/10.1007/BF00747579
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    Phosphorus retention and release from sandy soils of the Peel-Harvey catchment (1993)
    Springer
    Nutrient cycling in agroecosystems 36 (1993), S. 115-122 
    Details
    ISSN: 1573-0867
    Keywords: phosphorus ; retention ; release ; sandy soils
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In order to manage phosphorus (P) losses from soils to waterbodies, knowledge of the mechanisms through which P is retained or released from the soil is essential. Sandy soils of the Peel-Harvey catchment (Western Australia) were subjected to a range of environmental and management factors in the laboratory and field in order to gain an understanding of the mechanisms that affect the magnitude of P losses. Sandy soils accumulated P, despite having little sorption capacity, and this accumulation could be monitored by measuring an acid-extractable fraction. The potential, short-term P loss could be estimated by determination of water-soluble soil solution P prior to winter rains. An annual cycle of the change in arbitrarily defined soil-P pools is discussed in relation to environmental and management factors. Laboratory experiments indicated that P rundown and potential annual P loss in the absence of P fertilizers could be estimated using bicarbonate extractable P. Phosphorus losses were decreased by the application of fertilizers with a low content of water-soluble P. The low ability of sandy soils of the Peel-Harvey coastal catchment to retain P, when compared to other Western Australian soils, is because of low contents of clay minerals and iron and aluminium hydrous oxides.
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    URL: http://dx.doi.org/10.1007/BF00747581
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    The effect of level of nitrogen nutrition upon mineral content and removal in grasses and wheat (1990)
    Springer
    Nutrient cycling in agroecosystems 26 (1990), S. 229-235 
    Details
    ISSN: 1573-0867
    Keywords: Grass ; wheat ; nitrogen nutrition ; dilution curve ; mineral content ; mineral removal ; phosphorus ; potassium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The important effect of nitrogen in changing the patterns of mineral content and mineral removal is analysed for grass swards and wheat. Different models are proposed; accumulated dry matter developed throughout a growing period is shown to be an excellent reference for assessing the evolution of the plant mineral content and the mineral removal the growing crop. Applications in diagnosing mineral nutrition status and optimising fertilizer use are proposed and discussed.
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    URL: http://dx.doi.org/10.1007/BF01048760
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