00550nam a22001817a 4500 OSt 260612b |||||||| |||| 00| 0 eng d 631.41 S48S Sinha, Ram Binod Studies on The Effect of Pyrite in Combination with Organic Manures in Relation to Iron, Zinc, Sulpher and Phosphorus Nutrition of Crops in Calcareous Soil Pusa, Samastipur RAU 1988 209P. Ph.D. 1988 Soil Science Ph.D. Thesis ddc T 52035 52035