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This article in AJ

  1. Vol. 54 No. 4, p. 351-353
    Received: Aug 7, 1961

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Potassium Uptake by Orchardgrass as Affected by Time, Frequency and Rate of Potassium Fertilization1

  1. R. R. Robinson,
  2. C. L. Rhykerd and
  3. C. F. Gross2



Fall or spring applications of K fertilizer to orchardgrass resulted in herbage that was high in K in the spring but low in late summer and fall. An annual summer application of K greatly reduced the trend toward luxury consumption in the spring and K starvation in the fall. Calculated K recovery in the herbage plus residual exchangeable soil K accounted for all of the applied K.

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