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This article in AJ

  1. Vol. 79 No. 3, p. 520-524
     
    Received: July 15, 1986
    Published: May, 1987


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doi:10.2134/agronj1987.00021962007900030024x

Potassium, Boron, Nitrogen, and Lime Effects on Corn Yield and Earleaf Nutrient Concentrations1

  1. J. R. Woodruf,
  2. F. W. Moore and
  3. H. L. Musen2

Abstract

Abstract

Intensified production practices have included irrigation and higher-than-traditional rates of N and K to reach high yield goals for corn (Zea mays L.). Previous studies have shown that B is low in southeastern Coastal Plain soils and that additions of high rates of N, K, and lime to soils low in B may decrease B availability. This 3-yr factorial experiment was conducted on a Dothan loamy sand (Plinthic Paleudults) to examine the effects and interactions of B, K, N, and lime on corn yield and earleaf nutrient concentrations with the objective of better defining B needs of intensive corn production. Two levels of B (0 and 2.24 kg ha−1), K (131 and 317 kg ha−1), N (202 and 426 kg ha−1), and lime (0 and 1120 kg ha−1) were employed. Corn yields showed a positive response to N in 1982, a negative response to lime in 1983, and no response to individual factors in 1984. There was a trend in 1982 and 1984 toward less yield (average 18.2% less) where high K was added with no B, compared to where low K was added with no B. There was a significant B ✕ K interaction effect (P≤0.05) on yield in 1984, and the same effect (P≤0.01) appeared for the 3-yr combined analysis of variance. Earleaf B was influenced by N ✕ B interaction in 1982 and lime ✕ K interaction in 1984. The results showed that B fertilization was necessary to prevent yield reduction where high K fertilization was used.

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