Effect of Integrated Nutrient Management on Soil Chemical and Biological Properties under Dolichos Bean Cultivation

A field experiment to study the effect of integrated nutrient management on soil chemical and biological properties under dolichos bean cultivation was conducted during the months of June-October 2020, at the Experimental Farm, Department of Horticulture, Assam Agricultural University, Jorhat-13. The experiment was laid out in Randomized Block Design with seven treatments which were replicated three times. The results revealed that the maximum available nitrogen (372 kg ha-1), phosphorus (47.13 kg ha-1), potassium (184.67 kg ha-1) were observed in T5 (25 % RD of NPK + Enriched Vermicompost @ 2t ha-1) and organic carbon (0.98 %) also found highest in T5 (25 % RD of NPK + Enriched Vermicompost @ 2t ha-1). The microbial population, soil enzymes activity i.e dehydrogenase (DH) activity (122.20 µg TPF g-1 soil 24 hr-1), phosphomonoesterase activity (50.90 µg p-nitrophenol g-1 soil hr-1) and soil microbial biomass carbon (SMBC) (240 µg g-1 24hr-1) were observed highest in T5 (25 % RD of NPK + Enriched Vermicompost @ 2t ha-1).