Impact of different ratios and levels of nitrogen and phosphorus on growth, yield and nutrient uptake of rainfed soybean

A field experiment was carried out during kharif 2015 with thirteen ratios of nitrogen (N) and phosphorus (P₂O₅) fertilizers with constant potassium level (25 kg K₂O ha⁻¹) on soybean cultivar DSb 21. 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^s 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), haulm yield (3788 kg ha⁻¹), number of filled pods plant⁻¹ (44.73), total number of pods plant⁻¹ (47.57) and 100 seed weight (15.40 g) This treatment also recorded significantly higher total dry matter production (34.15g) that higher gross monetary returns, net monetary returns and B: C ratio (Rs. 1, 12, 595, Rs. 89, 770 ha⁻¹ and 4.93, respectively).