THE EFFECT OF DIFFERENT ROW SPACINGS AND PLANT ARRANGEMENTS ON SOYBEANS

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Abstract
Two short-season soybean (Glycine max (L.) Merrill) cultivars, Altona and Clay, were tested in narrow rows (10, 15, 20 and 30 cm), and at four rectangularities (1:1, 1:2, 1:3, and 1:4) giving plant densities that ranged from 11 000 to 4 000 000 plants per hectare. Significant yield differences were demonstrated by narrowing row width, but not by changing rectangularity. In a second experiment, the same cultivars were grown in rows 15, 30, 45, and 60 cm apart, but with the density held constant at 670 000 plants/ha. This resulted in respective rectangularities of 1:1.5, 1:6, 1:13.6 and 1:24. Neither seed yield nor its components showed any significant response to row spacing in the second experiment.

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