HomeInternational Rice Research Notesvol. 23 no. 3 (1998)

Evaluation of P Sources in a Rice - Wheat Cropping System in Northwestern India

B Singh | Y. Singh | T. S. Khera | C. S. Khind | Rachna Nayyar

Discipline: Agriculture, Crop Management



Increasing costs have resulted in reduced applications of P fertilizers to rice - wheat systems in the Indo-Gangetic plains of India. Partly to address this issue, nitrophosphate P sources have been developed by acidulation of rock phosphate with nitric acid rather than imported and expensive sulfuric acid. These are cheaper than the traditional superphosphate and diammonium phosphate.