Effect of chemical and nano nitrogenous fertilizers on availability of major nutrients (N, P, K) in soil after harvest of the sorghum crop

Abstract

A pot culture experiment was conducted during summer 2017 at Department of Agril. Chemistry & Soil Science, College of Agriculture, JAU, Junagadh to study the effect of chemical and nano nitrogenous fertilizer on availability of major nutrients (N, P, K) in soil after harvest of sorghum (Sorghum bicolor L.) crop. The investigation was carried out in CRD design three replication with seven different treatments. The treatments included T1 = Absolute control (No fertilizer), T2 = Nano polymer, T3 = RDN dose of sorghum crop through chemical fertilizer, T4 = NN2.5-2.5 times reduction of RDN through nano fertilizer, T5 = NN5-5 times reduction of RDN through nano fertilizer, T6= NN10-10 times reduction of RDN through nano fertilizer, T7 = RDN through nano fertilizer. The results revealed that the application of RDN through nano fertilizer significantly improved the availability of nitrogen, phosphorus and potassium in post-harvest soil.