National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692 Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
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 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), number of filled pods plant-1 (44.73), 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). The treatment receiving N/P fertilizer ratio of 0.78 (basal application of 40 kg N, 69 kg P2O5, 25 kg K2O ha-1 + foliar application of nitrogen @ 7 kg N ha-1 through urea at initiation of flowering and foliar application of nitrogen @ 7 kg N ha-1 at 15 days after first spray) was on par with the N/P fertilizer ratio of 0.70.
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