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Journal of Agronomy
Year: 2002  |  Volume: 1  |  Issue: 3  |  Page No.: 119 - 122

Effects of GA3 and IAA and their Frequency of Application on Morphology, Yield Contributing Characters and Yield of Soybean

Pulak Kumar Sarkar, Md. Shahidul Haque and M. Abdul Karim    

Abstract: Effect of plant growth regulators on yield of soybean was investigated. Plants of soybean cv BS-3 were sprayed at three different times with two concentrations (100 and 200 ppm) of gibberellic acid (GA3) and indole acetic acid (IAA). GA3 at 100 ppm had regulatory effect to enhance the plant height, number of branches, number of leaves, leaf area per plant, number of flowers, number of pods, percentage of fruit set, number of seed per plant, seed yield per plant, 100-seeds weight and seed yield (t ha-1). On the other hand, 100 ppm IAA produced the highest plant height, number of flowers, number of pods, percentage of fruit set, number of seed per plant, seed yield per plant and seed yield (t ha-1), as compared to other plant growth regulators and control. IAA at 200 ppm increased number of branches, number of leaves, leaf area per plant, 100-seeds weight and net assimilation rate.

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