The result that used of pumice sulfate in the material instead of used dolomite . Found that the weight of yield Pleurotussajor- caju used a pumice sulfate and dolomite gave weight of yield didn’t different statistically.Because of pumice sulfate have nutrients that applied to the mushroom which are the nutrients contained same in the dolomite The used of pumice sulfate in stead of dolomite dose not add nutrients to the plant material effect of weight is not different