Exploitation and Use of Low Grade Phosphate Rock - Indian Experience

摘要

The Indian requirement of phosphatic fertilizers by the end of 90's is in the order of 3.23 million tons of P2O5 per annum. Indigenous rockphosphate can provide about 0.41 million tons of P2O5 only, the balance P2O5 is to be imported each in the form of rock-phosphate, phosphoric acid or finished phosphatic fertilizer. The requirement is likely to increase further when measures to correct the present imbalance in the consumption of phosphatic fertilizers. The balanced use of N and P is essential not only for crop production but also for maintaining soil fertility.