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  • nitrogen
  • phosphorus
  • Springer  (4)
  • Blackwell Publishing Ltd
  • National Academy of Sciences
  • 1990-1994
  • 1980-1984  (4)
  • 1925-1929
  • 1980  (4)
Collection
Keywords
Publisher
  • Springer  (4)
  • Blackwell Publishing Ltd
  • National Academy of Sciences
Years
  • 1990-1994
  • 1980-1984  (4)
  • 1925-1929
Year
  • 1
    Electronic Resource
    Electronic Resource
    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 
    Details
    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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01073181
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  • 2
    Electronic Resource
    Electronic Resource
    Dry matter content and mineral composition of potatoes grown in Cyprus (1980)
    Springer
    Potato research 23 (1980), S. 371-375 
    Details
    ISSN: 1871-4528
    Keywords: nitrogen ; phosphorus ; potassium ; calcium ; sodium ; nitrate ; sulphate ; micronutrients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The specific gravity and dry matter content of 193 tuber samples (cultivars: Arran Banner, Spunta, Up-to-Date, Cara) from crops grown at Kokkinochoria, the major potato growing area of Cyprus, were related to each other as follows: Dry matter (%)=−269.59+268.24×specific gravity. This regression accounted for 82.4% of the variation; the fiducial limits (P〈0.05) for single determinations of specific gravity were±1.54 percentage units. The mineral contents of the tubers were similar to those reported in other countries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02360677
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Thermal conductivity of nitrogen at high pressures (1980)
    Springer
    International journal of thermophysics 1 (1980), S. 375-381 
    Details
    ISSN: 1572-9567
    Keywords: thermal conductivity ; high pressure ; nitrogen ; computer simulation ; modified Enskog theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The results of the measurements of the thermal conductivity coefficients of nitrogen at 298.15 K from atmospheric pressure up to 1 GPa are reported. The experimental values are used to test the Modified Enskog Theory and the corresponding state principle. The experimental values are also compared with the results of computer simulation of the thermal conductivity of a Lennard Jones fluid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00516564
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  • 4
    Electronic Resource
    Electronic Resource
    Annual changes of nitrogen and phosphorus in two aquatic macrophytes (Nymphaea Tuberosa and Ceratophyllum Demersum) (1980)
    Springer
    Hydrobiologia 70 (1980), S. 31-35 
    Details
    ISSN: 1573-5117
    Keywords: macrophyte ; nitrogen ; phosphorus ; nutrients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The nitrogen and phosphorus content of Nymphaea tuberosa and Ceratophyllum demersum, in Lake Onalaska, Wisconsin, was studied for a year. On a yearly basis, N. tuberosa exhibited nitrogen and phosphorus differences among seasons and among plant parts. Variation among plant parts was also evident in C. demersum. However, within individual plant structures, no seasonal differences were observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00015487
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