Validation of soil test and yield target based fertilizer prescription equations developed for groundnut in Alfisols

Abstract

Study was undertaken to validate the developed fertilizer prescription equations through field experiments in southern zone of Andhra Pradesh. The results emanated from the validation experiment proved the validity of the fertilizer prescription equations for groundnut by recording the yield targets within ± 10 variation. STCR-IPNS 30 q ha-1 of groundnut has proved its superiority and recorded a mean yield increase of nine percent over farmer practice. The increase in benefits: cost ratio was 1.1 times higher in STCR-IPNS model over farmer practice. Soil test based fertilization resulted in increase in yield, benefit: cost and sustenance of soil fertility with STCR-IPNS as compared to farmers practice.