GROWTH, DEVELOPMENT AND YIELD OF COTTON DEPENDING ON POTASSIUM NUTRITION IN CONDITIONS OF SOILS OF LOWINCOME EXCHANGE POTASSIUM

Abstract

The results of the research have established that in the conditions of medium-supplied with exchange potassium meadow-sulfur soils, due to the use of 90-120 kg / ha of potassium fertilizers or in NPK ratios of 1: 0.7: 0.4; 1: 0.7: 0.5 against the background of N250P175 kg / ha, and on typical sulfur soils, poorly provided with exchange potassium due to the use of potassium fertilizers in a dose of 120-150 kg / ha or in fertilizer ratios of 1: 0.7: 0.5; 1: 0.7: 0.6 can be obtained additionally 33.7-35.4 and 32.7-34.8 quintals of high-quality raw cotton.