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This article in AJ

  1. Vol. 62 No. 5, p. 578-580
     
    Received: Jan 19, 1970


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doi:10.2134/agronj1970.00021962006200050008x

Yield Response of Upland Cotton (Gossypium hirsutum L.) to Several Spacing Arrangements1

  1. B. S. Hawkins and
  2. H. A. Peacock2

Abstract

Abstract

A 3-year study with Upland cotton (Gossypium hirsutum L.) was conducted at Experiment, Ga., to determine the effects of plants/hill, within-row hill spacings, and plant populations on lint yield.

Highest yields were obtained when the populations were within a range of 96,000 to 144,000 plants/ha. below this population range yield decreased sharply; above this population range yield was reduced but the rate of decline was more gradual than the decline in the low population range. The highest average yield (919 kg lint/ha) was obtained from five plants/hill spaced 40 cm apart (120,412 plants/ha). When all hill spacings were combined, the mean yield from five plants/hill (879 kg/ha) was significantly (P : .05) higher than yield from two plants/hill (812 kg/ha). Yield differences among hill populations of three, four, or five plants were not significant. Whenth e plants/hill treatments were combined, yields from plants spaced 20 and 40 cm apart were significantly higher (P = .01) than yield from plants spaced 60 cm apart. The plants/hill ✕ hill spacings interaction was not significant.

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