Effect of various concentrations of organic and inorganic nutrients on growth of cowpea [Vigna unguculata (L.)] under valley conditions of Dehradun

An agronomic investigation was conducted during 2020 at Agriculture Research Farm, Dolphin (P.G) Institute of Biomedical and Natural Sciences, Dehradun. The aim of study was to study the effect of organic and inorganic nutrients on growth of cowpea. The experimental plot was laid out in a randomized block design with 7 treatments and 3 replications. It was of 3.0 m x 2.0 m2 size with spacing of 30 cm x 20 cm per bed. The experiment was conducted using treatments T1 (Control), T2 (75% RDF + 25% Vermicompost), T3 (75% RDF + 25% vermicompost + 25% Neem cake), T4 (75% RDF + 25% Neem cake), T5 (75% RDF + 25% FYM), T6 (50% RDF + 25% Neem cake) and T7 (100% RDF). The experimental data revealed that the observations taken during 30, 45, 60, and 90 DAS among all the treatments (T3) i.e. 75% RDF + 25% vermicompost + 25% Neem cake showed maximum plant growth among most of the treatments at different growth intervals i.e. plant height, number of leaves, number of branches, number of plants per bed and dry mater accumulation per plant, whereas minimum plant growth was recorded under treatment (T1) control.