Division of Soil Science and Agricultural Chemistry, Indian Agricultural Research Institute, New Delhi
In laboratory incubation studies with Laccadive phosphate earths and Mussoorie rock phosphate in different soils, it was observed that citrate solubility of the phosphate rock and the pH of the soil are the most important factors governing the availability, and the particle size of rock phosphate had little effect on solubility at low pH.
Particle size, indigenous rock phosphate: direct application
