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International Journal of Agricultural Research
Year: 2011  |  Volume: 6  |  Issue: 8  |  Page No.: 653 - 659

Response of Soybean (Glycine max) Genotypes to Plant Population and Planting Geometry in Northern India

Guriqbal Singh    

Abstract: Optimum plant population and planting geometry are the important factors for obtaining high grain yields of soybean. The aim of the present study was to find out optimum plant population and planting geometry in soybean. Accordingly three field experiments were conducted. An experiment studied the effect of three plant populations (0.30, 0.45 and 0.60 million plants ha-1) on the growth and yield of eight soybean genotypes. Plant populations of 0.45 and 0.60 million plants ha-1 with grain yield of 1474 and 1516 kg ha-1, respectively, were on par and produced significantly higher grain yields than 0.30 million plants ha-1 (1285 kg ha-1). Genotype SL 525 produced the highest grain yield (2432 kg ha-1) followed by SL 517 (1802 kg ha-1). Two experiments studied the effect of three planting geometries (row spacing of 22.5, 30 and 45 cm with constant plant population of 0.45 million plants ha-1) on the growth and yield of eight genotypes in 2003 and six genotypes in 2004. Planting geometries differed neither in growth nor in yield. Genotype SL 525 was the highest yielder (3452 kg ha-1 in 2003 and 3264 kg ha-1 in 2004). Genotype JS 335- the most popular genotype in central and southern India- failed at Ludhiana i.e., in northern India (291 kg grain yield ha-1) due to high infestation with mungbean yellow mosaic virus as Ludhiana is the hot spot for this disease. Plant population of 0.45 million plants ha-1 and row spacing of 45 cm were found optimum for soybean productivity.

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