Effect of Direct and Residual Effects of Different Sulfur Fertilizers on Groundnut and Wheat Cropping System on Typic Haplaquent Soils

Abstract

A field experiment was conducted on sulfur deficient soil during kharif dry seasons of 1993, 1994, and 1995 to study the comparative efficacy of selected sources of sulfur to groundnut (Arachis hypogaea L.). The results of the experiment were tested on farm trial in cultivator's field during the kharif season of 1999. The yield of groundnut crop in experimental field increased significantly with increasing levels of sulfur up to 40 kg S ha⁻¹. Among the various sources tested, gypsum was the best with respect to yield, followed by single super phosphate and ammonium sulfate. In on‐farm trial the application of gypsum at 20 kg S ha⁻¹ increased the yield parameters and yield over un‐treated control. The residual effect of different sulfur sources on wheat (Triticum aestivum) grain yield, the effect of treatments was non significant but the levels of sulfur and the interaction between source and levels were significant.