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  • Articles  (13)
  • resistance  (9)
  • kinetics
  • nitrogen
  • Springer  (13)
  • American Meteorological Society
  • 1985-1989
  • 1980-1984  (13)
  • 1965-1969
  • 1955-1959
  • 1950-1954
  • 1982  (13)
  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (13)
Collection
  • Articles  (13)
Source
Keywords
Publisher
  • Springer  (13)
  • American Meteorological Society
Years
  • 1985-1989
  • 1980-1984  (13)
  • 1965-1969
  • 1955-1959
  • 1950-1954
Year
Topic
  • 1
    Electronic Resource
    Electronic Resource
    Effects of nitrogen and phosphorus fertilizers on unshaded Amazon cocoa in Nigeria (1982)
    Springer
    Nutrient cycling in agroecosystems 3 (1982), S. 13-16 
    Details
    ISSN: 1573-0867
    Keywords: cocoa ; nitrogen ; phosphorus ; soil analysis ; Nigeria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract No extensive investigation on the effect of fertilizers on Amazon cocoa variety (Theobroma cacao L.) has been performed in Nigeria. Therefore eight fertilizer treatments involving nitrogen and phosphorus, replicated six times at four locations across southern Nigeria, were established in 1973. The four N levels (N0, N1, N2, N3) involved were 0, 80, 160 and 240 kg ha−1 y−1, and the two P levels (P0, P1) were 0 and 67 kg ha−1 y−1. Results of the first 5 years of fertilizer application are reported. Response to P was observed at all locations, and the response was statistically significant at 2 of the locations. There was no response to the application of nitrogen. The data suggest, however, that there is only a response to phosphorus when nitrogen is applied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01063405
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  • 2
    Electronic Resource
    Electronic Resource
    Application of potassium and nitrogen fertilizers in young spruce stands (Picea abies Karst.) (1982)
    Springer
    Nutrient cycling in agroecosystems 3 (1982), S. 17-23 
    Details
    ISSN: 1573-0867
    Keywords: nitrogen ; potassium ; fertilization ; Norway spruce ; quartzite ; podzol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In young spruce plantations on mineral soils the growth of the trees is improved by N application only in rare cases, and by P or K application only on sites over parent rock, which is poor in available fractions of these nutrients. Interpretation of a field trial showed that on extremely poor quartzitic soils potassium deficiency limited growth during the first years of crop development. Potassium deficiency ended at pole stage (about 15 years after planting). N deficiency began at sapling stage (about 8 years after planting) and increased later. On quartzitic and similar sites with a low cation-exchange capacity, appropriately phased applications of K and N markedly improve the site index and yield level of young spruce stands. Thus, it was shown that the stock of stemwood can be raised from 3 to 13 m3 per ha up to an age of 16 years.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01063406
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  • 3
    Electronic Resource
    Electronic Resource
    Analytical methods in15N research (1982)
    Springer
    Nutrient cycling in agroecosystems 3 (1982), S. 37-62 
    Details
    ISSN: 1573-0867
    Keywords: ammonium-N ; distillation ; fertilizers ; mass spectrometer ; nitrate-N ; nitrogen ; urea
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Although the stable isotope15N is an indispensable tool in research to trace the fate of fertilizer nitrogen in soil/plant systems, the analytical methods used in this research are time consuming and prone to many errors. This paper outlines the methods used in an international program of nitrogen research coordinated by the International Fertilizer Development Center (IFDC). The different steps in the digestion, distillation, and isotope ratio analysis of15 N-labeled soils, plant material, and fertilizers are described. Details on the use of a series of controls to check the precision and accuracy of the methods are also given. It is hoped that this comprehensive description of procedures will encourage the expanded and proper use of15N.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01063408
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  • 4
    Electronic Resource
    Electronic Resource
    Uneven distribution of banded fertilizer nitrogen in the field related to computer modelling (1982)
    Springer
    Nutrient cycling in agroecosystems 3 (1982), S. 379-383 
    Details
    ISSN: 1573-0867
    Keywords: band placement ; computer modelling ; nitrogen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A model was developed to describe the distribution of mineral nitrogen when applied in a fertilizer band, taking into account nitrification and diffusion. Good agreement was found between the calculated values and those measured in a field experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01048941
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  • 5
    Electronic Resource
    Electronic Resource
    Solanum berthaultii P.I. 265858; a possible source of protection against all strains of PVX (1982)
    Springer
    Potato research 25 (1982), S. 127-130 
    Details
    ISSN: 1871-4528
    Keywords: potato ; virus breeding ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A clone ofSolanum berthaultii P.I. 265858 was not systemically infected when manually inoculated with isolates of PVX groups 1 to 3 but developed top-necrosis when grafted-inoculated, demonstrating it is hypersensitive. Plants sap- or graft-inoculated with an isolated of PVX group 4 or with PVXHB (a recently-discovered strain overcoming all reported sources of resistance to PVX) were infected systematically. The plants were extremely sensitive to these isolates, young leaves becoming necrotic and the plant dying within a few weeks and, whilst still alive, plants contained little virus and were a poor source of infection. These characteristics suggest that this clone could provide a means of breeding cultivars that would be protected against all known strains of PVX.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02357281
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  • 6
    Electronic Resource
    Electronic Resource
    Resistance of Capsicum species to tobacco, tomato and pepper strains of tobacco mosaic virus (1982)
    Springer
    European journal of plant pathology 88 (1982), S. 163-170 
    Details
    ISSN: 1573-8469
    Keywords: TMV strains ; pathogenicity ; resistance ; hypersensitivity ; susceptibility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Samenvatting Om verschillen in pathogeniteit tussen twee in Nederland voorkomende paprikastammen van het TMV nader vast te stellen, werd een aantalCapsicum-herkomsten, waaronder negen soorten, op resistentie getoetst. Hierbij werden de representatieve paprika-isolaten P 11 en P 8 vergeleken met de uit tomaat afkomstige isolaten MA en SPS als vertegenwoordigers van respectievelijk de tabaks- en tomatestam van het TMV. Bij het beoordelen van de symptomen duidden lokale, necrotische vlekken en afvallen van geïnoculeerde bladeren op resistentie, systemische necrosen of mozaïeksymptomen op vatbaarheid. In deze symptomen kwamen tussen de gebruikte stammen verschillen in virulentie tot uitdrukking. Er werden echter vooral verschillen in agressiviteit waargenomen met betrekking tot zowel afzonderlijke, voor resistentie uitsplitsende,Capsicum-herkomsten als het totale aantal getoetste herkomsten. Van de ruim 73 herkomsten waren er 58 resistent tegen MA en SPS, 31 daarvan tegen P 11, maar slechts vijf daarvan tegen P 8. Deze resistentie tegen P 8 werd gevonden inC. chinense.
    Notes: Abstract A number ofCapsicum accessions including nine species were tested for resistance to TMV based on hypersensitivity. The tobacco strain MA and the tomato strain SPS, which were both isolated from tomato, and two pathogenically distinct pepper strains P 11 and P 8, were used. Of the 73Capsicum accessions tested 58 were resistant to MA and SPS, 31 were resistant to P 11 and five were resistant to P 8.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01977275
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  • 7
    Electronic Resource
    Electronic Resource
    The use of an evolutionary scheme for cauliflowers in the screening of genetic resources (1982)
    Springer
    Euphytica 31 (1982), S. 725-734 
    Details
    ISSN: 1573-5060
    Keywords: Brassica oleracea var. ; botrytis ; cauliflower ; evolution ; resistance ; Plasmodiophora brassicae ; clubroot ; Delia radicum ; cabbage root fly ; genetic resources
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A hypothetical scheme is given for the evolution of the different types of cauliflower (Brassica oleracea var. botrytis L.). This has been useful in identifying sources of reduced susceptibility to cabbage root fly (Delia radicum (L.)), and may also be useful in the search for reduced susceptibility to clubroot (Plasmodiophora brassicae Woron.). It is argued that knowledge of the phylogeny of types within each crop species is of great importance in the exploitation of genetic resources.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039211
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  • 8
    Electronic Resource
    Electronic Resource
    Breeding for resistance to yellow disease of hyacinths. II. Influence of flowering time, leaf characters, stomata and chromosome number on the degree of resistance (1982)
    Springer
    Euphytica 31 (1982), S. 621-628 
    Details
    ISSN: 1573-5060
    Keywords: Hyacinthus orientalis ; hyacinth ; Xanthomonas hyacinthi ; yellow disease ; resistance ; general combining ability ; flowering date ; leaf characters ; stomata ; correlation coefficients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Analysis of an incomplete diallel design with 14 hyacinth cultivars and 4 wild accessions of Hyacinthus orientalis showed a significant GCA component for resistance to yellow disease. The late flowering hyacinth cultivars ‘King of the Blues’ and ‘Marconi’ and the early flowering Hyacinthus orientalis 70129 were found to be the best combiners for yellow disease resistance. Within a cultivar, the degree of earliness itself was not associated with the degree of resistance. Correlation coefficients of leaf characters and degree of resistance showed that hyacinths with short and/or narrow leaves are generally more resistant than those with long and/or broad leaves. Tetraploid cultivars with few, large stomata tend to be susceptible, diploid ones with many small stomata tend to be the more resistant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039200
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  • 9
    Electronic Resource
    Electronic Resource
    The production of alien monosomic additions in Beta vulgaris as a source for the introgression of resistance to beet root nematode (Heterodera schachtii) from Beta species of the section Patellares (1982)
    Springer
    Euphytica 31 (1982), S. 313-323 
    Details
    ISSN: 1573-5060
    Keywords: Beta vulgaris ; cultivated beet ; wild Beta species ; resistance ; Heterodera schachtii ; beet root nematode ; interspecific hybridization ; alloploidy ; alien chromosome addition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Experiments were carried out for adding the chromosome carrying resistance to beet root nematode (Heterodera schachtii) from the wild Beta species of the section Patellares (B. procumbens, B. webbiana and B. patellaris) to the genome of B. vulgaris. Preliminary experiments indicated that crosses between the wild species and B. vulgaris cultivars of the mangold type yielded on average more viable F1 hybrids than crosses with sugar and fodderbeet. However, crossability varied strongly between individual parental combinations. It was concluded that most types of B. vulgaris can be hybridized with the wild species of the section Patellares if a sufficient number of pair-crosses is made. Crosses between diploid cultivars or species of the section Vulgares and diploid wild species of the section Patellares yielded many hybrids which, however, were highly sterile. From crosses between tetraploid B. vulgaris and the wild species a great number of viable allotriploid and allotetraploid hybrids was obtained. In the backcross progenies of allotriploid hybrids 26% alien monosomic additions occurred, of which 4.1% carried the resistance bearing chromosome of B. procumbens or B. patellaris. The programme will be continued by sereening progenies of the resistant monosomic addition plants for the occurrence of resistant disomic introgression products.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021646
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  • 10
    Electronic Resource
    Electronic Resource
    Molecular diversity and plant disease resistance: An electrophoretic comparison of near-isogenic lines of wilt-resistant or -susceptible Pisum sativum L. cv. William Massey (1982)
    Springer
    Euphytica 31 (1982), S. 341-348 
    Details
    ISSN: 1573-5060
    Keywords: Pisum sativum ; pea ; fusarium wilt ; resistance ; protein ; esterase ; polyacrylamide gradient gel electrophoresis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The soluble proteins from two near-isogenic lines of Pisum sativum. cv. William Massey have been compared electrophoretically. These lines differ in their physiological response to wilt (Fusarium oxysporum f. sp. pisi), one being susceptible and the other resistant. The total protein profiles derived from the two lines appear to be identical. The resistant line differs electrophoretically from the susceptible line in carrying an esterase component which has been derived from its resistant parent, cultivar Delwiche Commando.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021649
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  • 11
    Electronic Resource
    Electronic Resource
    Resistance of lettuce (Lactuca) to the leaf aphid Nasonovia ribis nigri. 1. Transfer of resistance from L. virosa to L. sativa by interspecific crosses and selection of resistant breeding lines (1982)
    Springer
    Euphytica 31 (1982), S. 291-299 
    Details
    ISSN: 1573-5060
    Keywords: Lactuca ; lettuce ; interspecific crosses ; leaf aphids ; Nasonovia ribis nigri ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Interspecific crosses were carried out between the three Lactuca species L. virosa, L. serriola and L. sativa to transfer resistance to the leaf aphid Nasonovia ribis nigri from L. virosa to the cultivated lettuce. L. sativa, L. serriola was used as an intermediate parent between the other two species. Many irregularities were observed in the interspecific hybrids, ranging from premature dying of F1 plants resulting from a kind of bastard necrosis till complete male and female sterility and deviating microsporogenesis. Using in vitro culture and after several backcrosses male and female fertile plants were obtained with a L. sativa habit and with resistance to the leaf aphid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021643
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  • 12
    Electronic Resource
    Electronic Resource
    Resistance to the glasshouse whitefly (Trialeurodes vaporariorum Westw.) in sweet pepper (Capsicum annuum L.) (1982)
    Springer
    Euphytica 31 (1982), S. 977-980 
    Details
    ISSN: 1573-5060
    Keywords: Capsicum annuum ; sweet pepper ; Trialeurodes vaporariorum ; glasshouse whitefly ; cultivars ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Fourteen cultivars, one F1-hybrid and one half-wild type (Cind) of sweet pepper were tested on resistance to glasshouse whitefly. Several mutually significant levels of resistance were found. Most resistant appeared to be ‘California Wonder’, ‘Severka M’, ‘Korál’ and ‘Yolo Wonder’. During the test sweet pepper plants were infested both with whiteflies and their parasite — Encarsia formosa, which caused the blackening of whitefly puparia. The blackened puparia are easily seen, enabling an easier and more rapid evaluation of the number of puparia present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039238
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  • 13
    Electronic Resource
    Electronic Resource
    Inheritance of resistance to Didymella lycopersici Klebb. in tomato (Lycopersicon Mill.) (1982)
    Springer
    Euphytica 31 (1982), S. 981-989 
    Details
    ISSN: 1573-5060
    Keywords: Lycopersicon ; tomato ; Didymella lycopersici ; foot- and stemrot ; resistance ; interspecific crosses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The inheritance of the resistance to Didymella lycopersici was studied on F3- and Bc1⊗-lines from interspecific crosses of L. esculentum with L. hirsutum and with L. hirsutum glabratum. The resistance is not monogenic and is inherited in dominant fashion. The high h2 values based on line means offer possibilities to seleet efficiently for enhanced levels of resistance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039239
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