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This article in AJ

  1. Vol. 59 No. 1, p. 51-53
    Received: June 28, 1966

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Yield and Nutrient Uptake by Orchardgrass as Affected by 14 Annual Applications of N, P and K1

  1. R. N. Singh,
  2. D. C. Martens,
  3. S. S. Obenshain and
  4. G. D. Jones2



Orchardgrass (Dactylis glomerata) grown on Davidson clay loam showed a yield response to N in 1949 and 1950, to N and K from 1951 to 1953 and to N, P and K from 1954 to 1962. During the latter period, yield response to a given nutrient occurred only if adequate amounts of the other two were applied. Lower yields were obtained with 171 than with 114 kg of N/ha in 1958 without applied K and in 1960 to 1962 with applied K. This apparently resulted from higher uptake of K with 171 kg of applied N and a cumulative depletion of available K in the soil.

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