Enhancement Of Black Gram Productivity Through Soil And Foliar Application Of Nutrients
Field investigation comparising the preliminary experiment aimed to identify suitable nutrient schedule for black gram and the main experiment carried out for enhancement of black gram productivity through humic acid and micro nutrients. The preliminary and main field experiments were carried out at experimental farm, Department of Agronomy, Faculty of Agriculture, Annamalai university, Annamalainagar, Tamil Nadu, India. The preliminary field experiment was laid out in randomized block design of seven treatments with three replications. The results of the preliminary field experiment revealed that the 100% increased dose of RDF (50:100:50 Kg NPK ha-1) was most suitable for black gram witnessed by more yield. The main field experiments were conducted during �kharif� and �Rice fallow� conditions in split plot design and replicated thrice with three different nutrients levels as main plot treatment and foliar spray of humic acid + micro nutrient mixture combination is the sub plots. Based on the results of two field experiments, the treatment M3S3 soil application of 100% increased dose of RDF (50:100:50 Kg NPK ha-1) along with foliar application of 85% concentrated humic acid + Fulvic acid + 12% Zn + 3% other traces at 25 and 45 DAS excelled all other treatment conditions by recording higher growth and yield attributes and yield. It also recorded enhanced monetary benefit in terms of net income and return rupee-1 invested.
Keywords: Nitrogen, Phosphorus, Potassium, Humic Acid, Micronutrients.