Division of Soil Science and Agricultural Chemistry, Indian Agricultural Research Institute, New Delhi, 110012
Continuous application of phosphatic fertilizer to a rice-wheat cropping sequence for over ten seasons resulted in an increase in soil phosphorus status particularly in the Al-P and Fe-P fractions. There was, however, no consistent relation between these fractions and available P (Olsen P) in the soil.
Soil phosphorus fractions, cropping system
