Soil test base fertilizer recommendation by soil fertility rating for major field crops and vegetables in Uttar Pradesh for Food Security of India

Production potential of a soil depends upon inherent capacity of soil to supply the nutrients, additionof nutrients through chemical fertilizers and organic and bio-sources. Continuous growing of crop sincelong time with imbalance use of fertilizers declined its use efficiency. Fertilizer application on the basis of soil testing rating has been the practices of farmers from the inception of green revolution. Theserecommendation are suitable for medium soil fertility condition irrespective of wide variation thatoccurs in soil fertility status. Hence under high or low fertility condition application of fertilizer become a wasteful expenditure or insufficient, respectively. In both the cases optimum fertilizer use efficiencycannot be achieved. Fertilizer recommendation on the basis of each value of soil test can be better approach than earlier approach. Under this study regression equation equating different soil test valueand nitrogen, phosphorus and potassium dose to be applied in field are developed for different crops. Tofacilitates the analyst for the easy recommendation ready reckoner was also developed. With the help ofequation and ready recknor, fertilizer recommendation for different crops and vegetables for each soiltest value will certainly be economically cost effective.