Effect of various NPK nutrient doses on the growth of different greengram [Vigna radiata (L.)] varieties

Greengram [Vigna radiata (L.)] is the most important and extensively grown crop in India. It mainly contributes in enhancing soil fertility through nitrogen-fixing properties. The experiment was conducted to assess the supply of NPK nutrients but in an optimum or balanced manner which promotes chemical fertilizers to help in enhancing the greengram production and productivity. However, the experiment was conducted in Split Plot design with three main plot and three sub-plot factors and total treatment combinations were nine and each treatment replicated thrice. The main plot consists of three greengram varieties, IPM 02-3, IPM 410-3 and PDM-139. Further, each main plot is divided into three sub-plots consists of three different recommended doses of fertilizers viz., 75%, 100% and 125% RDF respectively where, 100% RDF consist of 25:50:30 NPK Kg ha^-1 and the study revealed that the greengram variety “IPM 02-3” performs better on growth parameters. Among doses, 125% RDF of NPK performs better regarding growth attributes viz., Plant height (cm), plant dry matter (g plant^-1), number of branches (plant^-1), Leaf Area Index and root nodule count (plant^-1).