Effect of Crop Residue and Nutrient Management on Carbon Dynamics and Soil Health in Soybean Glycine max L Merrill under Chambal Command Area

Abstract

newlineA field experiment entitled Effect of Crop Residue and Nutrient Management on Carbon Dynamics and Soil Health in Soybean [Glycine -max (L.) Merrill] under Chambal Command Area was conducted at Agriculture Research Station, Ummedganj- during two consecutive Kharif seasons of the year 2019-20 and 2020-21 to study the effect of crop residue and nutrient management on growth, yield and quality of soybean in Chambal commandarea,to work out the nutrient content and uptake bysoybean, to assess the physico-chemical and biological properties of soil and to evaluate different chemical pools of carbon and their significance in relation to soil andcrop.The experiment consisted of 16 treatment combinations in factorial randomized block design with three replications with two factors Crop residue and Nutrient management and both the factors have four levels. The levels of crop residue management are CR1 Crop residue incorporation without irrigation, CR2 Crop residue incorporation with irrigation, CR3 Crop residue incorporation with irrigation and application of ureaat 25 kg ha-1, CR4 Crop residue incorporation with irrigation and application of urea at 25 kg ha-1+ cellulolytic microbes at 2.0 kg ha-1 and Nutrient management are F1 Control, F2 75% RDF, F3 100% RDF (20:40:40 NPK kg ha-1) and F4 125% RDF. The crop residue incorporated in plots one month before sowing. Variety RKS-45 of soybean was sown as per recommended package of practices. Results revealed that application of crop residue incorporation with irrigation and application of urea at 25 kg ha-1+ cellulolytic microbes at 2.0 kg ha-1along with 100% RDF increased plant height, chlorophyll content, total nodules plant-1, effective nodules plant-1, leghaemoglobin content, fresh and dry weight of nodules, pods plant-1, seeds pod-1, seed yield, haulm yield, biological yield, nutrient content and uptake by N, P, K, S, Zn, Fe, Mn and Cu in seed and haulm, protein content seed in soybean and nutrient content along with their uptake by crop (N, P, K,S and micronutrient