Division of Soil Science and Agricultural Chemistry, Indian Agricultural Research Institute, New Delhi
Studies on the evaluation of basic slag from Rourkela and Tata steel mills, blastfurnace slag from Tata mill and phosphatic earth deposits of Minicoy and Laccadive Islands have shown that basic slag benefits the crop through its supply of both calcium and phosphorus in acid soils. Blast furnace slag does not contain phosphorus but it is an effective source of calcium supply to crops in acid soils. Phosphate earths were found to be less effective than basic slag (Rourkela) but were as good as superphosphate. The water soluble form of phosphorus has not proved to be better than the citrate soluble ones in these acid soils.
Basic slag, blast furnace slag, phosphate earth and acid soils
