Optimizing Integrated Plant Nutrient Supply through STCR Approach for Targeted Yield of Forage Oat (Avena sativa L.) in an Inceptisols

During Rabi 2018-19, an Inceptisol field test was conducted at the Agriculture Research Farm at Banaras Hindu University, Varanasi, using STCR technique, from which fertiliser recommendation equations for oat (Avena sativa L.) may be developed. Soil test results, oat fresh forage yield and NPK uptake by oat crop were used to attain four essential basic parameters, i.e., nutrients required to produce one quintal of fresh forage (NR), fertilizer contribution of nutrients (% CF), soil nutrient contribution (% CS) and organic matter contribution from FYM (CFYM). A quintal of fresh forage required 0.26, 0.04, and 0.30 Kg of N, P2O5 and K2O, respectively. Soil Nutrient Contribution Proportions (CS%): 35.81, 48.44, and 64.87 N, P2O5, and K2O, respectively. N, P2O5, and K2O percent added through fertilizer alone (CF %) and FYM alone (CFYM) were 59.17, 47.38, and 115.25; 24.19, 5.82, and 2.33, respectively. The ready reckoner doses of fertilizer were emphasized on these specific criteria for various soil test values and required to make recommendations for fresh forage oat yields for NPK alone and NPK + FYM.