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This article in AJ

  1. Vol. 80 No. 5, p. 834-836
     
    Received: July 24, 1987
    Published: Sept, 1988


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doi:10.2134/agronj1988.00021962008000050030x

Planting Seed Density in Relation to Cotton Emergence and Yield

  1. W. C. Hofmann ,
  2. D. L. Kittock and
  3. M. Alemayehu
  1. Dep. of Plant Sciences, Univ. of Arizona, Tucson, AZ 85721

Abstract

Abstract

Cotton (Gossypium hirsutum L.) planting seed density has been related to seedling emergence and vigor, although its effects on yield are not clearly understood. Seed lots of the cultivar ‘DP90’ were separated into four density classes using a gravity separation table. These seed classes were evaluated along with an undivided seed sample and a sample from processed seed selected for commercial use. The seed classes were planted at three planting rates in seven tests conducted from 1983 to 1985 at Maricopa, Marana, and Safford, AZ. The soils at these locations are Typic Camborthids, Thermic Torrifluvents, and Typic Torrifluvents, respectively. The lowest density seed had significantly lower standard and cold germination test results; however, there were no differences among the other five seed classes in 2 of the 3 yr. Field emergence of the highest density seed was significantly greater than that of the other density classes for the seven tests combined, and was significantly lower for the lowest density seed. Lint yields produced by plants from the highest density seed were significantly greater than those of the four other seed classes, and the lowest density seed produced significantly lower yields. There were no significant interactions between planting seed density and planting rate for yield. The results indicate that cotton planting seed quality could be improved slightly by selecting higher density seed

Arizona Agric. Exp. Stn. Journal Article no. 4044.

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