Residual effect of integrated nutrient management and direct effect of fertility levels on growth, yield, monetary efficiency and soil properties of green gram under Indian mustard - green gram cropping sequence

A field experiment was carried out under medium black calcareous soil during rabi and summer seasons of 2020- 21 and 2021-22 at the Pearl Millet Research Station, Junagadh Agricultural University, Jamnagar, Gujarat, India, to study the Residual effect of integrated nutrient management and direct effect of fertility levels on growth, yield, quality, nutrient content, uptake and monetary efficiency of green gram .The eight treatments consisted of integrated nutrient management to Indian mustard in rabi season as main plot treatments in RBD. During summer season each main plot treatments was splited into three sub plot treatments with three levels of recommended dose of fertilizers to green gram in split plot design. The residual effect of 50% RDF + FYM @ 10.0 t ha^-1 applied to preceding Indian mustard recorded significantly higher growth parameters of the succeeding summer green gram crop viz., plant height, number of branches/plant and dry matter accumulation at 45 DAS and at harvest, respectively, physiological parameters viz., CGR and NAR at different stages, yield attributes and yield viz., number of pods per plant, length of pod, number of seed per pod, seed, stover and biological yields, quality parameters viz., protein content and protein yield, nutrient content viz., N and P content in seed and stover, N, P, K, S, Fe, Zn and Mn uptake by seed and stover, total uptake by green gram and available N, P₂O₅ and organic carbon in soil after harvest of green gram. Whereas, direct application of fertility levels to green gram in summer season is concerned, the treatments having 100% RDF recorded significantly higher values of growth attributes, physiological parameters, yield attributes, seed and stover yields, protein content, protein yield, nutrient content (N and P), uptake of N, P, K, S, Fe, Zn and Mn by seed and stover and available nitrogen and phosphorus after harvest of green gram crop. The highest gross return (₹106443ha^-1), net return (₹73583 ha^-1) and B: C ratios (2.24) were obtained under residual effect of treatment 50% RDF + FYM @ 10.0 t ha^-1 to Indian mustard crop. Among the fertility levels applied to green gram higher gross return (₹98808 ha^-1), net returns (₹64773 ha^-1) and B: C ratios (1.90) were obtained with application of 100% RDF in green gram.