Effect of puddling methods, water regimes and NPK levels on yield, income and water use of boro rice (Oryza sativa L.)

The effect of puddling methods, water regimes and NPK levels on boro rice were studied in a field experiment at the ICAR Research Complex for Eastern Region, Patna. Power tiller puddling was better than that by tractor drawn cultivator. Continuous ponding for 10 days twice at tillering and flowering stages combined with intermittent irrigations during rest of the period was given better yield over intermittent irrigation during entire season. The crop has responded upto 150 per cent of recommended NPK schedule (100: 50: 40 kg N, P2O5 and K2O ha-1). Maximum grain yield of 5.29 t ha-1 was recorded with power tiller puddling keeping continuous ponding for 10 days twice at tillering and flowering stages with 150 per cent recommended dose of NPK.