Effect of sulphur fertilization, humic acid and biofertilizers on soil nutrient status and yield of rajma (Phaseolus vulgaris L.)

A field experiment was carried out to study “Studies on effect of sulphur fertilization, humic acid and biofertilizers on soil nutrient status of rajma (Phaseolus vulgaris L.)” cultivar Phule Rajma during rabi season of the year 2024-2025 at departmental farm of Soil Science, College of Agriculture, Badnapur. The experiment was laid in randomized block design with three replications and seven treatments viz., T₁: 100% RDF (60:80:00 NPK kg/ ha), T₂: 100% RDF+ 25 kg Sulphur ha^-1, T₃: 100% RDF + 25 kg ZnSO₄ ha^-1, T₄: 100% RDF + 25 kg Sulphur ha^-1 + seed inoculation of sulphur oxidizing bacteria + Rhizophos., T₅: 100% RDF + 25 kg ZnSO₄ ha^-1 + seed inoculation of sulphur oxidizing bacteria + Rhizophos, T₆: 100% RDF + 25 kg Sulphur ha^-1 + seed inoculation of sulphur oxidizing bacteria + Rhizophos + 10 kg humic acid ha^-1, T₇: 100% RDF + 25 kg ZnSO₄ ha^-1 + seed inoculation of sulphur oxidizing bacteria + Rhizophos + 10 kg humic acid ha^-1. The study showed that the application of sulphur, humic acid, biofertilizers affected on yield and soil nutrient status of rajma. The availability of organic Carbon, macro nutrients N, P, K, S, DTPA micronutrients Zn, Fe, Cu, Mn and Grain and straw yield significantly higher with application treatment T₆ 100% RDF + 25 kg Sulphur ha^-1 + seed inoculation of sulphur oxidizing bacteria + Rhizophos + 10 kg humic acid ha^-1 and at par with treatment T₇: 100% RDF + 25 kg ZnSO₄ ha^-1 + seed inoculation of sulphur oxidizing bacteria + Rhizophos + 10 kg humic acid ha^-1 and the least values are recorded in treatment T₁ 100% RDF. However, the soil chemical properties like pH, EC, CaCO₃, showed non-significant results as compared to properties.