Production Potential and Economics of Aerobic Rice-based Cropping Systems in Southern Agroclimatic Zone of Andhra Pradesh

摘要

Field experiments were conducted during Kharif and rabi seasons 2011 -12 and 2012-13 at the dry land farm of S.V.Agricultural college, Tirupati to study about the nutrient management in aerobic rice - based cropping systems. The significantly higher riceequivalent yield was with sunhemp-rice-groundnut cropping system during both the years of study. The residual effect of different graded nutrient levels to kharif aerobic rice on rabi crops shown that rice equivalent yield was highest with 175% recommended dose of nutrients (140-70-70 N, P_20_5 and K_2O kgha~(-1)), but it was comparable with 150% recommended dose of nutrients (120-60-60 N, P_20_5 and K_20 kg ha~(-1))-Among all the cropping systems, sunhemp-rice-groundnut recorded the highest gross returns, net returns and benefit cost ratio under the influence of 175% recommended dose of nutrients applied to kharif'rice, but it was on par with 150% recommended dose of nutrients.