Effect of integrated nutrient management on productivity, nutrient uptake and economics of green gram (Vigna radiata L.) in custard apple under rainfed condition

A field experiment was carried out during kharif season of 2010 at the Research farm, Rajiv Gandhi South Campus, BHU, Barkachha, Mirzapur district to determine the effect of inorganic fertilizers and organic manure on growth, yield and nutrient uptake by green gram (Vigna radiata L. cv. HUM-12). Experiment comprised of eight treatments, consisting of inorganic fertilizer and organic manure either alone or in combinations in Randomized Blocked Design (RBD) with three replications. The treatments are: T₁ (100% FYM), T₂ (100% Vermicompost), T₃ (100% Poultry manure), T₄ (50% RDF + 100% FYM), T₅ (50% RDF + 100% Vermicompost), T₆ (50% RDF + 100% Poultry manure), T₇ (100% RDF) and T₈ (control). Integrated application of T₆ (50% RDF +100% poultry manure) recorded significantly higher dry matter (39.11g plant⁻¹), straw yield (3102.12 kg ha⁻¹), seed yield (1002.16 kg ha⁻¹) and nutrient uptake in grain (28.13, 3.72 and 10.06 NPK kg ha⁻¹ respectively) of green gram, consequently resulted maximum gross return (Rs. 75110), net return (Rs. 59263) and benefit: cost ratio (4.56). Combined application of inorganic fertilizer and organic manure was found to be the best for higher productivity and profitability of green gram cultivation in custard apple based agri-horti system under rainfed condition.