O. P. SINGH, P. N. TRIPATHI, and R. SINGH, “Effect of phosphorus and sulphur nutrition on summer greengram (Phaseolus radiatus)”, Indian J Agri Sci, vol. 69, no. 11, Feb. 2013, Accessed: Oct. 28, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAgS/article/view/27124