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This article in AJ

  1. Vol. 50 No. 4, p. 192-197
    Received: Aug 23, 1957

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Effects of Some Environmental Factors on Flower Production and Reproductive Efficiency in Soybeans1

  1. P. H. van Schaik and
  2. A. H. Probst2



Percent flowers and pods shedding was increased both by high temperatures and long photoperiod in Clark and Midwest soybean varieties when grown under controlled temperatures and photoperiods. Shedding was not caused by a lack of viable pollen. Under field conditions varieties Mukden, T109, Acc. 2300–2, and Midwest shed 43, 73, 62, and 81% of flowers and pods combined, respectively. From one-third to one-half of total shedding was in the form of pods during various stages of development. Rising temperatures appeared to increase shedding.

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