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This article in AJ

  1. Vol. 58 No. 3, p. 287-289
     
    Received: Oct 2, 1965


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doi:10.2134/agronj1966.00021962005800030012x

Seed Yield Losses from Lodging and Combine Harvesting in Soybeans1

  1. C. R. Weber and
  2. W. R. Fehr2

Abstract

Abstract

Soybean seed yield losses due to lodging and to combine harvesting were evaluated for 3 years. The combine yield loss attributable to lodging averaged 29 pounds per acre, or 1.3%. Combine yield losses for 3.5, 5.0, and 6.5 inches of cut were 5.4, 9.4, and 12.2%, respectively. Using a linear relationship, there was an average yield loss of 38 pounds per acre, or 1.9%, for each inch of cut from ground line to 6.5 inches and 46 pounds per acre, or 2.3%, loss for each inch of cut from 3.5 to 6.5 inches.

Physiological effects of lodging were evaluated for 3 years with 7 soybean varieties by using 2 treatments, staking and nonstaking. Prevention of lodging increased yield 320 pounds per acre or 13.0%, decreased seed size 0.3 gram per 100 seeds, delayed maturity 2 days, and increased plant height 3 inches. Pod number, seed number, and seed size determinations indicated that the increase in seed yield was primarily due to an increased number of pods and seeds in the staked varieties.

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