Field experiments were conducted to study the residual effect of different levels of pyrite applied alone and in combination with organic manures (FYM and pressmud) on chlorophyll content, pod and shoot yields of groundnut, grain and straw yields of wheat, concentration and uptake of S by groundnut and wheat and availability of S in soil. The lowest level of pyrite showed very little residual value in affecting the above parameters whereas the higher levels were significantly effective. The residual effect of organic manures was significant even up to third crop of wheat. The combined application of highest level of pyrite (8 q ha−1) and organic manures gave maximum chlorophyll content in leaf, crop yields, concentration and uptake of S and availability of S in soil. Higher levels of pyrite in combination with organic manures proved very effective even up to the third crop after application with respect to sulphur nutrition of crops in that calcareous soil.
Pyrite, organic manures, residual effect, sulphur nutrition, calcareous soil
