J. P. Singh and O. P. Srivastava, “Role and requirement of sulphur in growth and tuber yield of potato (Solanum tuberosum)”, Indian J Agri Sci, vol. 65, no. 4, May 2012, Accessed: Oct. 26, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAgS/article/view/18231