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  • Articles  (21)
  • wheat  (11)
  • Nitrate  (10)
  • Springer  (21)
  • American Geophysical Union
  • American Meteorological Society
  • American Physical Society (APS)
  • Cambridge University Press
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  • 1982  (21)
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  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (21)
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  • Articles  (21)
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  • Springer  (21)
  • American Geophysical Union
  • American Meteorological Society
  • American Physical Society (APS)
  • Cambridge University Press
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  • 2000-2004
  • 1980-1984  (21)
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  • 1955-1959
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  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (21)
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  • 1
    Electronic Resource
    Electronic Resource
    Characteristics of the fate and efficiency of nitrogen in supergranules of urea (1982)
    Springer
    Nutrient cycling in agroecosystems 3 (1982), S. 63-71 
    Details
    ISSN: 1573-0867
    Keywords: nitrogen efficiency ; nitrogen fate ; rational use ; rice ; supergranules of urea ; wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Using15 N tracer technique, the fate and efficiency of nitrogen in supergranules of urea as compared with that in powdered urea were studied in rice fields. The results obtained show that supergranules of urea were characterized by the slight N loss and high N recovery as well as by delayed but long lasting fertilization effects. It follows that the supergranules should be applied earlier and at a lower rate as compared with powdered urea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01063409
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  • 2
    Electronic Resource
    Electronic Resource
    Polymorphism of prolamins and variability of grain quality (1982)
    Springer
    Plant foods for human nutrition 31 (1982), S. 243-249 
    Details
    ISSN: 1573-9104
    Keywords: wheat ; grain protein ; prolamin ; inheritance ; chromosome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Electrophoretic gliadin components are inherited as highly stable blocks of linked components. Multiple allelism of blocks controlled by polygenic loci of six gliadin-coding chromosomes has been revealed. The allelic states of these loci are interrelated with the variability of grain. The regularities discovered permit the use of gliadin polymorphism for estimation of genotype properties in breeding programs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01108633
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  • 3
    Electronic Resource
    Electronic Resource
    The genetics of gliadin and glutenin, the major storage proteins of the wheat endosperm (1982)
    Springer
    Plant foods for human nutrition 31 (1982), S. 229-241 
    Details
    ISSN: 1573-9104
    Keywords: wheat ; genetics ; endosperm ; seed proteins ; gliadins ; glutenins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract This paper reviews our present knowledge of the chromosomal location of the genes that control the synthesis of gliadins and glutenins, the two major groups of storage protein in the endosperm of wheat (Triticum aestivum). Allelic relationships and genetic linkage between genes are also discussed. The areas that require futher investigation are identified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01108632
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  • 4
    Electronic Resource
    Electronic Resource
    The effect of deep placement and surface application of nitrogen fertilizers at different light intensities on growth and yield of wetland rice (1982)
    Springer
    Plant and soil 68 (1982), S. 341-351 
    Details
    ISSN: 1573-5036
    Keywords: Deep placement ; Light intensity ; Nitrate ; Nitrogen ; Oryza sativa L. ; Rice ; Surface application ; Urea ; Wetland rice ; Yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Lowland rice (RD 3) was cultivated in containers of clay soil submerged with 5 cm water under controlled conditions in the phytotron. Deep placement of urea supergranules 5 cm in the soil significantly enhanced both plant growth and fertilizer efficiency when the plants were cultivated under high light intensity (70 Wm−2). At the highest urea level grain yield increased 119% above the control level, while growth and fertilizer efficiency was not as high when deep placement of calcium nitrate was used. The application of urea prills and calcium nitrate (18.4g Nm−2) in two split doses on the soil surface increased grain yield as much as 91% above the control level. At the lower nitrogen concentration (9.2 g N m−2), the urea prills were more efficient than calcium nitrate as indicated by the grain yield. The height of those plants fertilized by surface application was affected by the concentration and not the type of fertilizer. The number of tillers, however, was significantly higher on urea fertilized plants. When the rice plants were cultivated under low light intensity 930 Wm−2), neither the nitrogen fertilizers nor the method of application had a significant effect on growth and yield.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02197939
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of waterlogging on young wheat plants (Triticum aestivum L.) and on soil solutes at different soil temperatures (1982)
    Springer
    Plant and soil 69 (1982), S. 311-326 
    Details
    ISSN: 1573-5036
    Keywords: Aeration ; Calcium ; Carbon dioxide ; Ethylene ; Nitrate ; Nitrite ; Nitrous oxide ; Oxygen ; Potassium ; Roots ; Triticum aestivum ; Waterlogging ; Wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary We report a study of the mechanism by which the response of plants to waterlogging can be modified by soil temperature. Wheat was grown initially in well-aerated soil in a controlled environment room before the soil was flooded with aerated, deionized water. The soil temperature was maintained constant in the range 6–18°C while the air temperature was at 14°C. Waterlogging damage was greater in plants at the higher soil temperatures when the plants were compared at the same chronological age. However, when compared at the same growth stage, the response to soil temperature was little differenti.e. plants subjected to waterlogging for a long time at low soil temperatures exhibited a similar reduction in growth and other properties as those subjected briefly at higher temperatures. The concentration of dissolved oxygen in the soil solution declined rapidly at all temperatures, being almost zero after 36 h waterlogging. Temperature affected rates of change of the concentrations of dissolved carbon dioxide, ethylene, nitrous oxide, nitrite, nitrate, calcium and potassium. The importance of soil-and plant-determined properties in the waterlogging response of plants at different temperatures are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02372453
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  • 6
    Electronic Resource
    Electronic Resource
    Selection for yield in small plots of spring wheat (1982)
    Springer
    Euphytica 31 (1982), S. 549-564 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; wheat ; grain yield ; selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Four selection experiments were sown: single-row plots with single row-spacing (≃20 cm), single-row plots with double row spacing (≃40 cm), three-row plots and six-row plots both with single row-spacing (≃20 cm). Selection entries were mimiced by 16 different varieties or advanced breeding lines, which were also sown in a yield trial. Each experiment was laid out as a 4-times replicated randomized block design. Row length was 2 m. Alley borders and border-rows of multiple-row plots were harvested separately to evaluate the effects of different harvesting procedures on the selection efficiency. Removal of alley borders was found to be disadvantageous, since the gain in precision was more than offset by the loss in sampled area. Wide spacing of single-row plots improved the selection efficiency in comparison with normal spaced single-row plots. In multiple-row plots the selection efficiency was not improved by harvesting only the central rows. For gross plot yield (= yield of net plot + yield of alley borders) the differences in selection efficiency between the various selection plot-types were explained on the basis of the genetic variance, the environmental variance and the coefficient of genetic correlation with ‘farm’ yield as determined in the yield trial.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039193
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  • 7
    Electronic Resource
    Electronic Resource
    Factors of plant nutrient availability relevant to soil testing (1982)
    Springer
    Plant and soil 64 (1982), S. 129-138 
    Details
    ISSN: 1573-5036
    Keywords: Ammonium ; Buffering power ; Nitrate ; Nutrient availability ; Phosphate ; Potassium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In most arable soils the nitrate availability depends mainly on the quantity of nitrate present in the rooting zone at the beginning of the growing season. Easily mineralizable organic N and the release of non-exchangeable NH4 from clay minerals may in addition control the nitrogen availability during a season. In flooded soils, ammonium is the major form of nitrogen absorbed by plants. Ammonium dynamics in these soils is similar to that of potassium. The availability of both is controlled mainly by the intensity and buffering power for ammonium or potassium, respectively. Basically, intensity of the supply and buffering power for phosphate are the main factors determining the phosphate availability. The determination of the phosphate buffer power, especially in the root zone, however, remains to be difficult. Soil test methods should take into consideration the major factors and processes relevant to the availability of a particular plant nutrient.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02375167
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  • 8
    Electronic Resource
    Electronic Resource
    Nitrate reductase activity and growth response of forest species to ammonium and nitrate sources of nitrogen (1982)
    Springer
    Plant and soil 66 (1982), S. 373-381 
    Details
    ISSN: 1573-5036
    Keywords: Ammonium ; Eucalypt ; Forest ; Nitrate ; Nitrate reductase ; Nitrification ; Pine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Three tree species,Eucalyptus regnans (F. Muell.),E. obliqua (L'Herit.),Pinus radiata (D. Don) were grown in sand culture with different proportions of nitrate and ammonium. Nitrate Reductase Activity (NRA) was induced in root tissue of all species and in leaf tissue of the eucalypts. An increasing proportion of nitrate resulted in increasing NRA in all species and hence NRA alone is no indication of N-preference. The highest NRA was found withE. regnans, a result which has also been obtained in the mature forest. The growth ofE. regnans was least with NH4 + alone, whereas that ofE. obliqua was least with NO3 − alone. The soils of matureE. regnans forest have a high potential for nitrification while those ofE. obliqua forest show little nitrification. Thus the preference for particular N sources shown by seedlings in culture is supported by related properties of mature forests. It is postulated however, that the inducibility of a high level of RNA in seedlings is more likely a result of a preference for NO3 − than a cause.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02183803
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  • 9
    Electronic Resource
    Electronic Resource
    The kinetics of ammonium and nitrate uptake by young rice plants (1982)
    Springer
    Plant and soil 69 (1982), S. 225-232 
    Details
    ISSN: 1573-5036
    Keywords: Ammonium ; Nitrate ; Nutrient interactions ; Oryza sativa ; Rice ; Solution culture ; Uptake kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary An important process which affects the fate of fertilizer nitrogen (N) applied to a rice crop is crop N uptake. This uptake rate is controlled by many factors including the N-ion species and its concentration. In this study the relation between N concentration at the root surface and N uptake was characterized using Michaelis-Menten kinetics. The equation considers two parameters, Vmax and Km, which are measures of the maximum rate of uptake and the affinity of the uptake sites for the nutrient, respectively. Uptake rates of intact rice plants growing in a continuously flowing nutrient solution system were fitted to the Michaelis-Menten model using a weighted regression analysis. For NH4−N the Km values for 4- and 9-week-old rice plants indicated a high affinity for the ammonium ions relative to concentrations reported for rice soils after fertilization. The Vmax values expressed on a unit-root-mass basis decreased with plant age, indicating a reduction in the average density of uptake sites on the root surface. The kinetics of NO3−N uptake was similar to that of NH4−N when NO3−N was the only N source. However, if NH4−N and NO3−N were present simultaneously in the solution the Vmax for the uptake of NO3−N was severely reduced, while the Km was affected very little. This inhibition appears to be noncompetitive. Fertilization of young rice plants leading to concentration of N at the root surface above approximately 900 μM will not increase crop uptake and may contribute to inefficient N recovery by the crop. The existence of NH4−N and NO3−N simultaneously at the root surface may also lead to inefficient N recovery because of reduced uptake of NO3−N.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374517
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  • 10
    Electronic Resource
    Electronic Resource
    Availability of fixed NH4 + to crops (1982)
    Springer
    Plant and soil 65 (1982), S. 345-349 
    Details
    ISSN: 1573-5036
    Keywords: Ammonium ; Fixed ammonium ; Maize ; Mineralization ; Nitrate ; Nitrite ; Rhizosphere
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Significantly lower amounts of exchaneable NH4, soluble NO3 and clay-fixed NH4 forms of N were observed in the unfertilized fields with high rather than low-density cropped plots. Irrespective of planting densitites, the fixed NH4 content in soil increased with increase in the period of crop growth. N uptake by plant and total bacterial population of rhizosphere soil were significantly higher in the plots with the high than with the low-density planting. Availability of native fixed NH4 + to crops and biological utilization of a considerable amount of recently mineralized NH4 + in fixed form is indicated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02375055
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