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This article in AJ

  1. Vol. 58 No. 5, p. 479-480
     
    Received: Feb 10, 1966
    Published: Sept, 1966


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doi:10.2134/agronj1966.00021962005800050006x

Grain Sorghum Production on a Calcareous Cut Site as Influenced by Phosphorus, Zinc, and Iron Fertilization1

  1. N. L. Nossaman and
  2. D. O. Travis2

Abstract

Abstract

The interactions of P, Zn, and Fe fertilization of grain sorghum growing on Bca and Cca soil horizons from a recent cut site were examined. Phosphorus concentrations were increased from .21 to .26% by applications of O to 44 pounds P per acre without adding Zn. Phosphorus concentration remained approximately .20% when 20 pounds of Zn per acre were applied. Zinc concentration decreases with increasing P applications were also apparent. The effect of applying 8 pounds of Fe per acre with the P and Zn applications uniformly increased Zn concentration approximately 1 ppm. Grain yields depended on applications of both P and Zn. Forage yields were significantly increased only by P application.

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