2019•Journal of Food LegumesRequires access
Growth and yield of soybean as influenced by of graded nitrogen and phosphorus dose or under rainfed situations
Satyabrata Mangaraj, LH Malligawad, RK Paikaray, TR Sahoo
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Abstract
A field experiment was carried out during kharif 2015 with thirteen ratios of nitrogen and phosphorus fertilizers with constant potassium level (25 kg K2O ha−1) on soybean cultivar DSb 21 at MARS, UAS, Dharwad. The seed yield increased due to increasing N/P ratios up to 0.78. The treatment receiving N/P fertilizer ratio of 0.70 (basal application of 18 kg N, 46 kg P2O5, 25 kg K2O ha−1 + foliar application of nitrogen@7 kg N ha−1 at initiation of flowering and foliar application of nitrogen@7 kg N ha−1 at 15 days after first foliar spray) recorded significantly higher seed yield (3217 kg ha−1), total number of pods plant−1 (47.57), 100 seed weight (15.40 g) and seed weight plant−1 (18.31 g). This treatment also recorded significantly higher leaf area plant−1 (12.62 dm2), leaf area index (4.21) and total dry matter production (34.15 g)