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  • Articles  (124)
  • 2020-2024  (3)
  • 1990-1994  (83)
  • 1965-1969  (28)
  • 1945-1949  (10)
  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (69)
  • Process Engineering, Biotechnology, Nutrition Technology  (40)
  • Political Science  (16)
  • Sociology
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  • Articles  (124)
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  • 1
    Electronic Resource
    Electronic Resource
    Book reviews (1992)
    Springer
    World journal of microbiology and biotechnology 8 (1992), S. 550-551 
    Details
    ISSN: 1573-0972
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01201962
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  • 2
    Electronic Resource
    Electronic Resource
    An attempt to anticipate biological control ofDiuraphis noxia (Hom., Aphididae) (1994)
    Springer
    BioControl 39 (1994), S. 211-223 
    Details
    ISSN: 1573-8248
    Keywords: Diuraphis noxia ; Aphelinus varipes ; Australia ; anticipating biological control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé Pour répondre à la menace que représente pour la céréaliculture australienne la dispersion mondiale deDiuraphis noxia (Mordvilko), il a été procédé à un essai de lutte biologique préventive par l'introduction d'un parasitoïde oligophageAphelinus varipes (Foerster) dans la biocénose aphidienne présente actuellement sur les céréales d'Australie. Des précisions sont données sur l'origine du parasitoïde utilisé, son introduction, son élevage et son lâcher en Australie, ainsi que sur les études connexes au champ et en laboratoire.A. varipes ne semble pas s'être acclimaté jusqu'à maintenant; les causes possibles sont analysées et discutées.
    Notes: Abstract Responding to the threat posed to the Australian wheat industry by the world-wide spread of the Russian wheat aphid,Diuraphis noxia (Mordvilko), an attempt to anticipate its biological control was made by introducing its oligophagous hymenopteran parasiteAphelinus varipes (Foerster) into the current Australian cereal aphid community. Details, of the source of the parasite material and its introduction, mass-rearing and release in Australia, together with follow-up studies in the field and laboratory are given. No evidence of establishment has been found so far and the possible reasons for this are explored and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02372359
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  • 3
    Electronic Resource
    Electronic Resource
    The retention of nitrate in acid soils from the tropics (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 6 (1990), S. 0 
    Details
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. In most soils of temperate regions nitrate is not held on soil surfaces and moves freely in solution. But when soils carry positive charges, nitrate is held as an exchangeable anion. As a result, leaching of nitrate is delayed relative to the movement of water. The delay can be predicted provided the anion exchange capacity (AEC) can be measured and the concentration of counter-anions is known. For soils with variable charge, the AEC varies with both pH and ionic strength, and the effective AEC should be determined under conditions similar to those in soil solution. A simple leaching method is described which satisfies this requirement. Delays in the leaching of nitrate measured in columns of repacked soil were strongly related to the AEC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-2743.1990.tb00805.x
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  • 4
    Electronic Resource
    Electronic Resource
    Effects of clearfelling on microbial biomass phosphorus in the Oh horizon of an afforested podzol in Mid-Wales (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 7 (1991), S. 0 
    Details
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. Microbial biomass C and P were monitored in the Oh horizon of an afforested podzol in Mid-Wales before and after clearfelling. Measurements over a 2-year period indicated that soil moisture and temperature control the seasonal fluctuations in biomass C in this soil. Clearfelling significantly increased biomass P in the Oh horizon. This was probably caused in part by increased fluxes of organic and inorganic phosphorus from the felling debris and litter horizons of the forest floor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-2743.1991.tb00872.x
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  • 5
    Electronic Resource
    Electronic Resource
    The influence of land management on concentrations of dissolved organic carbon and its effects on the mobilization of aluminium and iron in podzol soils in Mid-Wales (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 6 (1990), S. 0 
    Details
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. The aluminium (Al), iron (Fe) and Dissolved Organic Carbon (DOC) contents of the soil solution were monitored in two upland grassland and afforested podzol soils in Mid-Wales. Al organo-metallic complexes predominated in the O horizon leachates of the grassland soil, whereas inorganic monomeric Al forms dominated in the lower mineral horizons. Dissolved organic matter determines the chemistry, solubility, and transport of Al and Fe in the O horizon, and these are under strong biological control. The distributions of organic-Al, Fe and DOC within the soil profile were consistent with traditional podzolization theory. Observed increases in the molar ratios of Al:DOC in solution in the lower soil horizons may be responsible for the small solubility of Al organo-metallic complexes in those horizons. Afforestation increased the concentrations of organic-Al and Fe in the soil solution as compared with the concentrations observed for the grassland soil. Clearcutting further significantly mobilized Al and Fe from the upper soil horizon, primarily by increasing the DOC concentration in the soil water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-2743.1990.tb00823.x
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  • 6
    Electronic Resource
    Electronic Resource
    WHITE CLOVER AND HILL LAND IMPROVEMENT (1966)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 21 (1966), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: As a preliminary step in the development of improved bred varieties an examination has been made of the factors which contribute to the success or failure of white clover (Trifolium repens) in hill land reseeding. Severe restrictions are placed on clover performance and N fixation in many hill areas in Britain by the poor climate, the low pH and exchangeable base status of the soils and the low frequency of effective indigenous Rhizobium strains.Agronomic solutions to some of these problems exist, but experience in mid-Wales suggests the need for new bred varieties with improved adaptation to the prevailing conditions, particular attention being directed to the limitation of N fixation by low soil temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1966.tb00477.x
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  • 7
    Electronic Resource
    Electronic Resource
    A COMPARISON OF COCKSFOOT- AND TALL FESCUE-DOMINANT SWARDS FOR OUT-OF-SEASON PRODUCTION (1965)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 20 (1965), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Swards based on a mixture of SI 70 tall fescue and S215 meadow fescue were very early in spring, gave high yields for conservation in mid-season and, rested from mid-August, gave good grazing in November-December. Under this treatment, the tall fescue assumed dominance, and the swards were persistent and remained productive. The digestibility of the tall fescue swards was always higher than that of swards based on cocksfoot with which they were compared. During spring and autumn the former sward was better grazed by stock, but the position was reversed in mid-summer. Cattle grazing tall-fescue-dominant swards made better liveweight gains than those grazing cocksfoot swards during November-December.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1965.tb00401.x
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  • 8
    Electronic Resource
    Electronic Resource
    CLIMATIC FACTORS IN RELATION TO GROWTH AND SURVIVAL OF PASTURE PLANTS (1965)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 20 (1965), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The distribution of natural and cultivated grasslands in relation to climate and the use of various indices and diagrams in studies of crops and climate are discussed. Attempts to establish simple linear relationships between yield and weather components have been disappointing. Studies involving light, theoretical considerations of productivity, adaptation of herbage plants in relation to climatic origin, etc. have proved more useful. Problems involved in extending the work conducted under controlled conditions to the field, are stressed. Particularly important is a better characterization of the environment prevailing in and immediately above swards of different types. The importance of winter survival in Britain is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1965.tb00435.x
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  • 9
    Electronic Resource
    Electronic Resource
    MECHANICAL TREATMENT FOR IMPROVING UPLAND GRAZING (1965)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 20 (1965), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The botanical changes in a wet (Molinia) and a drier (Nardtts) upland pasture that followed a single defoliation by a forage harvester are briefly described. Without fertilizer the bare and litter-covered areas were soon recolonized by the original dominants; with lime and fertilizer the recolonization was mainly by Agrostis spp., even when Agrostis was a minor element in the original sward. These changes were markedly accelerated by the forage-harvester treatment. The results of surface seeding after the forage-harvester treatment are compared with those obtained after rotary cultivation. Contrasting moisture regimes and competitive thresholds led to considerable differences in sward balance and in establishment of sown species, and seeding was successful only on the wetter site. Too rapid regeneration of undesirable remnants was prevalent, but this and other hazards are related to the uneven deposit of litter left by the forage harvester; thick, slowly-rotting accumulations inhibited the redevelopment of rapidly-growing species and germination on seeded areas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1965.tb00395.x
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  • 10
    Electronic Resource
    Electronic Resource
    Simulation of the industrial fixed bed catalytic reactor for the dehydrogenation of ethylbenzene to styrene: heterogeneous dusty gas model (1993)
    s.l. : American Chemical Society
    Industrial & engineering chemistry research 32 (1993), S. 2537-2541 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie00023a016
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