Response of Bt cotton to plant geometry and nutrient combinations

A field experiment was conducted during kharif seasons of 2006 and 2007 for two years on vertisols. The experiment consisting of four spacings(120 x 60, 90 x 90, 90 x 60 and 90 x 45 cm) in main plots and ten nutrient combinations viz., no fertiliser, 80 kg N/ha, 120 kg N/ha, 160 kg N/ha, 75% RDF (90 - 45- 45 kg NPK/ha), RDF (120-60-60 kg NPK/ha),125% RDF (150-75-75 kg NPK/ha, 80 kg N- 40 kg K2O/ha, 120 kg N-60 kg K2O/ha and 160 kg N-80 kg K2O/ha in sub plots, was laid out in split plot design with three replications. The results revealed that planting Bt cotton at 90 cm x 45 cm with 150-75-75 kg NPK/ha gave higher kapas yield.