Effect of Sulphur with and without Potassium on Yield and Nutrient Uptake by Pigeonpea in Relay Inter Cropping System

A field experiment was conducted on medium black calcareous clayey soils duing kharif 2005 to 2007 at Pulse Research Station, J.A.U. Junagadh in factorial RBD having four replications and eight treatment combinations consisting of four levels of S (0, 20, 40 and 60 kg ha^-1) and two levels of K₂O (0 and 50 kg ha^-1). The varieties sown were Vaishali for pigeonpea and GG-7 for groundnut. The grain (1189 and 1183 kg ha^-1) and fodder (2971 and 3024 kg ha^-1) yield of pigeonpea as well as pigeonpea equivalent yield (1761 and 1752 kg ha^-1) were obtained significantly higher under application of 40 kg S and 50 kg K₂O per hectare, respectively. The content and uptake of S and K by crop were increased significantly under irrespective application of sulphur and potash. Similarly, the soil availability of S and K was also increased significantly with increased respective levels of S and K.