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Y. DEEPTHI KIRAN*, V. SUMATHI, G. PRABHAKARA REDDY, P. SUDHAKAR AND M.V.S. NAIDU
Department of Agronomy, S.V. Agricultural College, Tirupati – 517 502, Andhra Pradesh
A field study was conducted during rabi seasons of 2013-14 and 2014-15 at S.V. Agricultural College, Tirupati. The field experiments laid out in spilt plot design, replicated thrice by taking irrigation schedules (surface drip irrigation at 0.7, 0.8 and 0.9 IW/CPE ratios and weekly check basin irrigation) as main plots and nitrogen levels (160, 200 and 240 kg ha-1) as sub plots. The higher dry matter, kernel and stover yields and nutrient uptake by maize was found to be the highest when irrigations were scheduled at weekly intervals by check basin method, which was on par to that of drip irrigation at 0.9 IW/CPE ratio. As regards to nitrogen levels tried, all the parameters were found to be superior with the nitrogen dose of 240 kg N ha-1. The interaction between the irrigation schedules and nitrogen levels indicated that higher yields and nutrient uptake was recorded with scheduling irrigation either at weekly intervals through check basin method or by drip irrigation at 0.9 IW/CPE ratio along with 240 kg N ha-1. The experimental results concluded that maize crop can be grown economically at 0.9 IW/CPE ratio through surface drip irrigation with 240 kg N ha-1.