Fertilizer Prescriptions Equation for Targeted Yield in Radish under Integrated Plant Nutrient Management System in an Inceptisol

Abstract

A field experiment was conducted on an Inceptisol of Agricultural Research Farm, Banaras Hindu University, Varanasi during rabi 2022-23 by using integrated plant nutrient management system (IPNMS) on the basis of STCR approach. The aim of study was to develop fertilizers recommendation equation for cultivation of radish. Soil test data, fruit yield and NPK uptake by radish crop were used for achieving four important basic parameters, viz., nutrients required to produce one quintal of radish fresh fruit (NR), contribution of nutrients from fertilizers (% CS), contribution of nutrients from soil (% CF) and contribution of nutrients from organic matter-FYM (% C-OM). It was found that 0.27, 0.09 and 0.37 kg of N, P2O5 and K2O, respectively, were required for producing one quintal radish fresh fruit yield. The per cent contribution of nutrients uptake from soil, fertilizer and FYM were 17.0, 40.7 and 29.9 for N; 25.7, 52.8 and 58.1 for P2O5 and 6.68, 2.50 and 8.33 for K2O, respectively. By using these basic parameters, a ready reckoner of fertilizer doses was prepared with a wide range of soil test values for archiving desired yield targets of radish for mineral fertilizer and IPNMS situations.