G. S. BHATNAGAR, G. L. SHARMA, and P. C. CHAPLOT, “Long-term effed of continuous maize (Zea mays) wheat (Triticum aestivum) cropping system and manuring on soil fertility and stability in crop yield”, Indian J Agri Sci, vol. 64, no. 12, May 2013, Accessed: Oct. 29, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAgS/article/view/29664