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This article in AJ

  1. Vol. 51 No. 11, p. 645-648

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Vertical Distribution of Topdressed Fertilizer Phosphorus and Potassium in Relation to Yield and Composition of Pasture Herbage1

  1. E. C. Doll,
  2. A. L. Hatfield and
  3. J. R. Todd



Yield of grass-legume pasture for 2 years was increased by fertilization with P but not with K. Large amounts of nonexchangeable K were released when crop removal of K exceeded rate of application, but only relatively small amounts of applied K were fixed even when rate of application exceeded crop removal. No movement of P was detected below 3 inches, and no movement of K below 6 inches.

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