2024, Vol. 7, Special Issue 8

The present investigation entitled " Response of Phosphorus and Biofertilizers on Growth and Yield of Black Gram (Vigna mungo L.) " was carried out at Crop Research Farm of National Post Graduate College, Barhalganj, Gorakhpur, (U P.) during zaid season on 2022 - 23 with the objective to study the effect of Phosphorus and Biofertilizers (VAM + PSB) on growth, yield and quality of Black Gram (Vigna mungo L.). The soil of the experimental field was a silty loam in texture with low, medium and high in N, P and K respectively. The experimental site is situated in a subtropical zone in indo gangetic planes. The experiment was laid out in Randomized Block Design with 9 treatment combinations and 3 replications. Black gram was sown on 20th February 2023 with treatment combinations viz. T₁ - 30 kg P + VYM, T₂ - 40 kg P + VAM, T₃ - 50 kg P + VAM, T₄ - 30 kg P + PSB, T₅ - 40 kg P + PSB, T₆ - 50 kg P + PSB, T₇ - 30 kg P + VAM + PSB, T₈ - 40 kg P + VAM + PSB and T₉ - 50 kg P + VAM + PSB, respectively. The crop was harvested on 5th May 2023. Most of the results revealed that different levels of Phosphorus and Biofertilizers (VAM + PSB) had a significant effect on growth parameters, yield parameters and yield of Black gram. The conjoint application up to 40 kg P + VAM + PSB i.e. T₈ was registered significantly superior in growth attributes viz. plant height (Cm), number of branches per plant, leaf area index, number of nodules per plant and dry weight (g) and yield attributes viz. number of pods per plant, number of grains per pod, test weight (g) and grain yield and economic feasibility viz. gross return (Rs/ ha), net return (Rs / ha.) and benefit: cost ratio, respectively over the rest of the treatments except treatment combination T₉ i.e. 50 kg P + VAM + PSB which were at par to each other. The present paper is a critical review from research findings of eminent scientists on Phosphorus and Biofertilizer effect over black gram.