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On farm studies were conducted during kharif and rabi seasons for two consecutive years from 2019-20 to 2020-21 in 24 farmers fields each year in Vizianagaram district of Andhra Pradesh state to study and demonstrate the importance of balanced fertilization on rice-maize cropping system. The seven treatments consists of control, recommended N alone, recommended N and P, recommended N and K, recommended N, P and K, recommended NPK+ ZnSO4 and farmer’s practice. Balanced application of recommended dose of NPK (80-60-50 kg ha-1) along with ZnSO4 (50 kg ha-1) to rice and recommended dose of NPK (200-80-80 kg ha-1) to maize in rice-maize cropping system recorded significantly higher mean grain (5287 kg ha-1 and 7172 kg ha-1) and straw yield (7389 kg ha-1 and 9284 kg ha-1 ) during both kharif and rabi seasons. Over the years, maximum System Rice Grain Equivalent yields (8676 kg ha-1), higher gross (Rs 2,16,611 ha-1) and net returns (Rs 1,36,579 ha-1). In addition to improvement in the fertility status of soil, higher sustainable yield index (1.07) and per day system productivity (54.76 kg ha-1day-1) were recorded with recommended dose of NPK+ ZnSO4 . |
