Influence of Integrated Nutrient Management (INM) on agronomic and yield traits in Greengram Vigna radiata (L.) and Blackgram Vigna mungo (L.)

Balanced fertilizer application is one of the major components for enhancing crop productivity. High and / imbalanced use of nutrients has caused nutrient leaching from the soil resulted reduced yield of the crop. On the other hand applying of combination of organic and inorganic nutrients in balance has a direct effect on soil health and crop production. To understand this, conducted a field experiments with Greengram and Blackgram crops following integrated nutrient management approach in rabi season for two consecutive years (2018-19 and 2019-20) at RARS, Lam, Guntur. The Factorial Randomized Block Design (FRBD) with 18 treatment combinations viz., Factor A: T₁ -75% RDF, T₂ -100% RDF, T₃ -125%RDF; Factor B: 1. Control and 2. 5 t FYM ha^-1, Factor C: 1. Rhizobium 2. LNm16 and 3. Rhizobium +LNm16 and replicated thrice. The results revealed that application of 125% recommended dose of inorganic fertilizers reported significantly higher plant height (48.6 cm and 31.2 cm),branches plant^-1 (3.3 and 4.0), pods plant^-1(26.0 and 26.3), seed pod^-1 (11.3 and 6.5) and yield (1037 and 921 kg ha^-1) in greengram and blackgram respectively, between the organic manure applied and control plots, 5 t ha^-1 FYM applied plots grabbed five percent additional grain yield and all the yield attributing characters were also significantly influenced by the FYM application. Among the biofertilizer treatments, combined inoculation of rhizobium + LNm 16 significantly influenced the higher plant height, branches plant^-1, pods plant^-1, seed pod^-1, test weight and seed yield (1023 and 894 kg ha^-1). Overall, the three-treatment combination has reported higher yield than the organic manure or bio fertilizer inoculation alone.