Singh, J P, and O P Srivastava. “Role and Requirement of Sulphur in Growth and Tuber Yield of Potato (Solanum Tuberosum)”. The Indian Journal of Agricultural Sciences 65, no. 4 (May 25, 2012). Accessed July 4, 2026. https://epubs.icar.org.in/index.php/IJAgS/article/view/18231.