Effect of nutrient management and moisture conservation practices on plant NPK content (%), plant uptake at harvest and post-harvest soil fertility under rainfed Bt cotton

Abstract

A field experiment was conducted on clay soil of Regional Agricultural Research Station, Lam, Guntur to find out the effect of nutrition and moisture conservation practices on NPK content (%) in plants, plant uptake at harvest and post-harvest soil fertility. The nutrient management and moisture conservation practices influenced the NPK content (%) in plants, plant uptake at harvest and post-harvest soil fertility. Application of 125%RDF (150:75:75) with opening furrow for every row during last intercultural operation + foliar nutrition with 2% KNO3at square formation, flowering, and boll development stages recorded maximum percentage of plant NPK, maximum nutrient uptake and seed cotton yield and was on a par with 125% RDF (150:75:75) fertilizer application + foliar nutrition with 2% KNO3at square formation, flowering, and boll development stages and 100% RDF (120:60:60) + opening furrow for every row during last intercultural operation + foliar nutrition with 2%KNO3at square formation, flowering and boll development stages and lowest seed cotton yield was recorded with application of 100% RDF (120:60:60kg ha-1).