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  • Articles  (22)
  • Wheat  (13)
  • Nitrate  (10)
  • Springer  (22)
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  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (22)
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  • Articles  (22)
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  • Springer  (22)
  • American Geophysical Union
  • American Meteorological Society
  • American Physical Society (APS)
  • Cambridge University Press
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  • 2000-2004
  • 1980-1984  (22)
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  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (22)
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  • 1
    Electronic Resource
    Electronic Resource
    Natural senescence of the root cortex of spring wheat in relation to susceptibility to common root rot (Cochliobolus sativus) and growth of a free-living nitrogen-fixing bacterium (1982)
    Springer
    Plant and soil 66 (1982), S. 13-20 
    Details
    ISSN: 1573-5036
    Keywords: Acridine orange ; Cochliobolus sativus ; Common root rot ; Nitrogen fixation ; Nuclear staining ; Roots ; Senescence ; Wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Natural senescence of the root cortex was assessed by nuclear staining, for cultivars and chromosome substitution lines of spring wheat known to differ in (1) susceptibility to common root rot, (2) total rhizosphere populations and (3) ability to support growth of a free-living nitrogen-fixing bacterium. Together, three root rot susceptible wheat lines showed significantly more cortical senescence than did three resistant lines; the susceptible lines also support larger rhizosphere populations. The wheat line that supports growth of a nitrogen-fixing bacterium showed significantly less cortical death than did any other line. Substitution of chromosome pairs 5B or 5D between the parent cultivars Rescue and Cadet substantially altered the amount of root cortex death, which is thus genetically determined. It is suggested thatCochliobolus sativus and other weak parasites benefit from early natural senescence of the root cortex, and that the degree of susceptibility or resistance of wheat lines to common root rot is at least partly determined by differences in cortical senescence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02203397
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  • 2
    Electronic Resource
    Electronic Resource
    Use of triple-labelled nutrient solution to study the effects of root-infecting fungi on uptake of potassium, calcium and phosphorus by wheat (1982)
    Springer
    Plant and soil 66 (1982), S. 405-410 
    Details
    ISSN: 1573-5036
    Keywords: Gaeumannomyces graminis ; Hydroponics ; Ion uptake ; Radionuclides ; Root pathogens ; Wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Triple-labelled nutrient solution was used to compare the effects of seven root-infecting fungi on uptake of K, Ca and P by wheat. Plants grown in sand or hydroponic culture were transferred to solutions that contained42K,45Ca and32P for 24 h, then dried, ashed and digested in 6M HCl. To distinguish radiation emitted by42K,45Ca and32P plant digests were counted on two channels of a liquid scintillation counter immediately and 7 days later, after the decay of42K radiation. Plants infected byGaeumannomyces graminis took up and translocated less K, Ca and P to their shoots than uninfected plants. Other root-infecting fungi had little effect on uptake of these ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02183807
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  • 3
    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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  • 4
    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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  • 5
    Electronic Resource
    Electronic Resource
    Effects of shading and powdery mildew infection on senescence of the root cortex and coleoptile of wheat and barley seedlings, and implications for root- and foot-rot fungi (1982)
    Springer
    Plant and soil 69 (1982), S. 401-411 
    Details
    ISSN: 1573-5036
    Keywords: Barley ; Gaeumannomyces graminis ; Nuclear staining ; Pseudocercosporella herpotrichoides ; Root rot ; Senescence ; Wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Nuclear and cytoplasmic staining methods were used to study natural senescence of the root cortex and coleoptile of wheat and barley seedlings grown in glasshouse conditions. Coleoptiles of barley senesced more slowly than those of wheat, paralleling the known difference in rates of root cortex senescence in these cereals. The coleoptiles and root cortices of both cereals senesced more slowly in shaded than in unshaded conditions, but infection of the shoots of barley byErysiphe graminis had little effect on root cortex senescence. The results are discussed in relation to infection by root- and foot-rot fungi. Previous reports on the effects of illumination on take-all infection (Gaeumannomyces graminis) are explained. It is suggested that natural senescence of the coleoptile might affect establishment of infection by the eyespot fungus,Pseudocercosporella herpotrichoides, either directly or through the activities of competing microorganisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02372461
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  • 6
    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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  • 7
    Electronic Resource
    Electronic Resource
    Effect of different Mg/Ca ratios and electrolyte concentrations in irrigation water on the nutrient content of wheat crop (1982)
    Springer
    Plant and soil 65 (1982), S. 63-71 
    Details
    ISSN: 1573-5036
    Keywords: Mg/Ca ratio ; Water quality ; Nutrient content ; Wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A study conducted in pots to evaluate the effect of different Mg/Ca ratios (2, 4, 8 and 16) and electrolyte concentrations (20 and 80 meq/l) at SAR 10 in irrigation water on the nutrient uptake and yield of wheat crop in two soils revealed that the average grain and dry matter yields of wheat decreased significantly with an increase in Mg/Ca ratio in irrigation water, but the magnitude of decrease was greater at higher electrolyte concentration than at lower electrolyte concentration. The concentration of Na in both straw and grain of wheat increased and that of K decreased with an increase in Mg/Ca ratio and electrolyte concentration of irrigation water, which led to higher Na/Ca and Na/K ratios in the plant. Further, the concentration of Ca and Mg both in straw as well as in grain increased with increasing electrolyte concentration of the irrigation water. An increasing proportion of Mg in saline irrigation water resulted in decreased concentration of Ca and increased concentration of Mg in both straw and grain of wheat crop. It was also noticed that the increasing proportion of Mg over Ca in the poor quality irrigation water increased the P content of both straw and grain of wheat crop.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02376803
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  • 8
    Electronic Resource
    Electronic Resource
    Copper nutrition of wheat in relation to nitrogen and phosphorus fertilization (1982)
    Springer
    Plant and soil 65 (1982), S. 433-436 
    Details
    ISSN: 1573-5036
    Keywords: Copper-nutrition ; Nitrogen ; Phosphorus ; Wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In a pot culture study, copper addition to soil increased the crop yield only in presence of nitrogen. The latter increased the utilization of both native as well as applied copper but more that of applied. It also minimised the adverse effect of applied phosphorus on copper utilization. Phosphorus at the rate 45 ppm had the tendency of decreasing copper uptake by wheat if applied without nitrogen or with its low level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02375066
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  • 9
    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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  • 10
    Electronic Resource
    Electronic Resource
    Utility of phyllosphere N2-fixing micro-organisms in the improvement of crop growth (1982)
    Springer
    Plant and soil 68 (1982), S. 69-74 
    Details
    ISSN: 1573-5036
    Keywords: Azotobacter ; chroococeum ; Derxia ; gumnosa ; Klebsiella ; Nitrogen ; fixation ; Phyllosphere ; Triticum aestivum ; Wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Five highly active N2-fixing strains of Klebsiella isolated from the phyllosphere of tropical plants, KUPBR1, KUPBR2, KUPM, KUP4 and KUP6 along withAzotobacter vinelandii OP,A. chroococcum G40 andDerxia gumnosa were sprayed on the foliage of a high yielding wheat cultivar, Kalyansona. The strains of Klebsiella enhanced dry wt., chrorophyll and nitrogen content, and 1000 grain weight. Grain yield in inoculated plants varied between 19.9 and 25.09 quintals ha−1 against 24.34 quintals with urea. Best results were obtained with KUP4 which when applied at half dose was as effective as 52.5 kg Urea-N ha−1. Azotobacter and Derxia only slightly improved growth and nitrogen content of grain or straw.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374728
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