Effect of potassium and sulphur on forms of potassium, under pigeonpea grown in vertisols

The present investigation entitled “Effect of potassium and sulphur on forms of potassium, under pigeonpea grown in Vertisols.” was conducted on EAD Farm, College of Agriculture, Nagpur during kharif season of 2017-2018. The field experiment was laid out in Factorial Randomized Block Design (FRBD) with four levels of potassium (0, 15, 30 and 45 kg ha-1) and four levels of sulphur (0, 10, 20 and 30 kg ha-1). Results indicated that grain and straw yield; content and uptake of N, P, K and S increased with increased in rate of application of K and S. The K fractions viz., water soluble K, exchangeable K, non-exchangeable K, lattice K and total K were increased significantly with the application of 45 kg K2O ha-1 and 30 kg S ha-1 along with the recommended dose of N and P. The improvement in soil fertility status for major nutrients and micronutrients and also quality of grain in pigeonpea was influenced due to the application of potassium and sulphur along with RDF (25:50:00) NPK kg ha-1.