Impact of potassium nitrate foliar spray on productivity of Bt cotton

An experiment was conducted at Agricultural Research Station, Borwat Farm, Banswara during kharif -2010, 2011 and 2012 to find out the optimum quantity of foliar spray of KNO3 in Bt cotton under various KNO3 foliar spray treatments. Significantly higher seed cotton yield (2761 kg ha⁻¹) was recorded under three foliar sprays of 3 per cent KNO3 over control, application of MOP in four splits RD-K, full dose of MOP at sowing and remaining foliar spray of KNO3 treatments. However, it was found at par with four foliar sprays of 3 per cent KNO3 seed cotton yield (2816 kg ha⁻¹) and four foliar sprays of 2 per cent KNO3 seed cotton yield (2612 kg ha⁻¹), respectively.