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This article in AJ

  1. Vol. 61 No. 3, p. 439-441
     
    Received: Oct 15, 1968
    Published: May, 1969


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doi:10.2134/agronj1969.00021962006100030031x

Effect of Population and Row Spacing on the Performance of Four Corn (Zea mays L.) Hybrids1

  1. John Giesbrecht2

Abstract

Abstract

Four early corn hybrids were grown at the four populations of 30,000, 45,000, 60,000, and 75,000 plants per hectare, at each of the four spacings of 50, 65, 80, and 95 cm between rows. The row spacings did not affect grain yield. However, each increase in population produced a substantial increase in grain yield. Varieties differed significantly in their yield response to increased plant populations. The later maturing, taller hybrids were adapted better to the competition in high populations than were the earlier hybrids.

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