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Agronomy Journal Abstract -

Response of Corn to Small Amounts of Fertilizer Placed with the See: III. Relation to P and K Placement and Tillage1


This article in AJ

  1. Vol. 63 No. 3, p. 372-375
    Received: June 16, 1970

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  1. T. E. Bates2



Fertilizer was banded with the seed of corn (Zea mays L.) in a number of field trials at rates supplying 3.1, 5.4, and 2.5; g N, P, and K per meter of row, respectively. Fertilizer with the seed was applied in combination with separate and larger applications of N, P, and K at various placements and with different amounts of preseeding tillage.

Nitrogen placement did not appear to be critical in these trials.

When no fertilizer was applied with the seed, grain field was slightly greater where P was side banded than where it was disked or plowed down. When accompanied by fertilizer with the seed, P was as effective where it was plowed down as it was where it was side banded; but P disked in was not. Lower yields were obtained with disked K than with plowed down or side banded K. Fertilizer with the seed reduced the difference betweenK placements at early growth stages in one trial, but this interaction was not apparent in other trims or in grain yield.

Fertilizer with the seed reduced the yield response to preplanting tillage in one trial out of five.

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