S. K. SHUKLA and M. MENHILAL, “Competition functions and productivity in sugarcane-based associative and successive cropping systems in relation to nitrogen and sulphur nutrition”, Indian J Agri Sci, vol. 72, no. 6, May 2014, Accessed: Oct. 28, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAgS/article/view/40881