Studies on the effect of greengram to potassium humate on soil fertility

摘要

Field experiments conducted using potassium with greengram revealed the beneficial effect of potassium humate in enhancing the availability of nutrients to the plants. The treatments S_6 (30 kg ha~(-1)) at M_2 (Recommended dose of fertilizer) registered the highest carbon content of 0.53 percent in greengram with 9 percent percent more over the RDF (0.44 percent). Soil application of humic acid along with RDF exhibited a distinct improvement in the available N, P and K over RDF alone. The availability of secondary nutrients and micronutrients were also favourably influenced by the conjoint application of humic acid and mineral fertilizers.