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This article in AJ

  1. Vol. 48 No. 10, p. 455-459
    Received: Apr 26, 1956

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Nutrient Content of Corn as Related to Fertilizer Application and Soil Fertility1

  1. B. G. Ellis,
  2. C. J. Knauss and
  3. F. W. Smith2



Foliar analyses of corn leaves were made in conjunction with Kansas fertilizer experiments. A close relationship was found between content of exchangeable K in soil and leaf content of K. Definite establishment of minimum P content was not possible. Minimum N content for maximum yield varied with time of sampling, ranging from as much as 3.0% when corn was 3 feet high to only 1.9% at early ear stage. Addition of K to soils low in exchangeable K caused decreases in Mg content of leaves. Calcium content did not change markedly as a result of fertilizer application.

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