S. SINGH, K. P. SINGH, A. K. SARKAR, and S. K. SINGH, “Response of Indian mustard (Brassica juncea) and blackgram (Phaseolus mungo) grown in rotation to sulphur fertilization in acid soil”, Indian J Agri Sci, vol. 68, no. 7, Feb. 2013, Accessed: Oct. 23, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAgS/article/view/27597