Field experiment was carried out in summer 2007 and 2008 to evaluate the response of summer irrigated cotton to foliar nutrition of potassium as an alternative to soil application. The results revealed that highest seed cotton yield of 1854 kg/ha was recorded only with the soil application of recommended level of potassium in 4 equal splits at sowing, seedling, flowering and boll development stage. This was comparable with 4 sprays of KNO 3 (2%) at 60, 75, 90 and 105 days after sowing (1665 kg/ha). The economics of cultivation also revealed that soil application of recommended level of potassium in 4 spits was advantageous with the highest BC ratio of 2.11 indicating the superiority of soil application of potassium over foliar application.
