SAHA H, BISWAS T, BERA BK, ROY A. Comparative efficiency of rockphosphate and single superphosphate on release of available phosphorus and yield of soybean (Glycine max) in an acid soil*. Indian J Agri Sci. 2014;72(4). Accessed October 28, 2025. https://epubs.icar.org.in/index.php/IJAgS/article/view/40808