Poonam Gangola, Poonam Gautam, Sobaran Singh and Sarvesh Kumar
Abstract
Field experiment was conducted during 2013-14 to develop PHSTVs prediction equations adopting Inductive cum Targeted yield model (Ramamoorthy et al., 1967), on Mollisol of Pantnagar, with French bean maize in sequence. The experiment was laid out in a fractional factorial design comprising twenty four treatments (21 fertilizer treatments + three controls). Using pre-sowing soil test values, fertilizer doses and grain yield and/or NPK uptake by the crop as independent variables and post-harvest soil test values as dependent variable, PHSTVs prediction equations were developed. Significant R2 values (>0.65) were recorded for prediction equations which showed that these equations could be used for the prediction of post-harvest KMnO4-N, Olsen-P and NH4OAc-K. Using the predicted post harvest soil test values of French bean and maize, soil test based fertilizer recommendation for desired yield targets of any succeeding crop could be prescribed.