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Agronomy Journal Abstract -

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


This article in AJ

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

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  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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