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Interpretive Summaries:
2004 - Assessment of Phosphorus and Potassium Requirement for Maximum Economic Yield of Pulse and Oilseed Crops of the Central Plain Zone of Uttar Pradesh
2003 - Site-Specific Nutrient Management of Pulses and Oilseeds for Maximum Economic Yield, Produce Quality, and Farmer Profit in Uttar Pradesh
2002 - Site-Specific Nutrient Management of Pulses and Oilseeds for Maximum Economic Yield, Produce Quality and Farmer’s Profit in Uttar Pradesh
Assessment of Phosphorus and Potassium Requirement for Maximum Economic Yield of Pulse and Oilseed Crops of the Central Plain Zone of Uttar Pradesh
Uttar Pradesh is one of India’s major pulse-producing states, with 12% of the total area...21.6 million hectares (M ha)...and 18% of total production. Although pulse productivity in Uttar Pradesh is 45% higher than the country’s average (609 kg/ha), on-station agronomic and nutrient management experiments reveal great opportunity for improvement. This research was initiated to highlight the production gap for pulses and to develop balanced fertilization schedules that exploit the full potential of newly available improved cultivars of chickpea, pea, and lentil. A site-specific nutrient management (SSNM) strategy was evaluated (Series A), as well as the effectiveness of applying potassium (K), sulfur (S), and magnesium (Mg) through SKMg double salt (Series B).
Series A: Grain yield of pulses increased tremendously with adequate and balanced use of nutrients. The highest chickpea yield of 4.07 t/ha was obtained with nitrogen (N), phosphorus (P), and K (30-60-90 kg N-P2O5-K2O/ha) plus 40 kg S/ha, 20 kg zinc sulfate (ZnSO4)/ha, 10 kg manganese sulfate (MnSO4)/ha, and 5 kg borax (B)/ha. The state recommendation (SR) of 20-60-30 kg/ha produced 2.4 t/ha, or 41% less than the SSNM treatment. Biological N-fixation parameters in chickpea, such as nodules per plant, fresh weight of nodules, dry weight of nodules, N content of nodules, and leghaemoglobin contents, were 39%, 11%, 12%, 34%, and 11% higher under SSNM compared to the SR. Similar trends were recorded for N-fixation parameters of pea and lentil. The maximum economic yield of 3.52 t/ha was recorded for pea with the SSNM treatment above, which was 73% higher than SR of 20-60-40 kg/ha. Lentil yield under this SSNM treatment was 2.23 t/ha, or 36% higher than SR.
Series B: Yields of chickpea, pea, and lentil obtained with 15-60-40 kg/ha plus 40 kg S/ha and 20 kg Mg/ha...with K, S, and Mg supplied via SKMg double salt...were 57%, 60%, and 34% higher than with N application alone.
A large potential exists for improving pulse crop productivity with adequate and balanced fertilization. Current fertilizer recommendations need revision and should consider macronutrients, secondary, and micronutrients. SKMg double salt is an effective source for Uttar Pradesh pulse crops. Efforts are being made to have these results accepted as part of the effort to upgrade fertilizer recommendations. NWZ India-58
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