A field experiment was conducted during kharif 2012 in Inceptisols of Northern hills zone of Chhattisgarh to estimate the nutritional requirement, efficiencies of fertilizer, soil test and organic source (FYM) to estimate the fertilizer requirement for varying yield goals of maize crop based on soil test levels using INM approach. Maize crop required kg N, kg P and kg K for one quintal grain production. Fertilizer and soil test efficiencies estimated were and percent, respectively for N, and percent, respectively for P and and percent, respectively for K. The FYM contribution in terms of N, P and K were estimated , and per cent, respectively. Based on these basic parameters, fertilizer adjustment equation for N, P and K were evolved for different yield targets of maize based on soil nutrients level using FYM as organic component in INM. | Soil test - crop response correlation with maize under IPNS system in inceptisols of surguja hills zone of Chhattisgarh, India
