R. Singh and S. K. Agarwal, “Effect of levels of farmyard manure and nitrogen fertilization on grain yield and use efficiency of nutrients in wheat (Triticurn aestivum)”, Indian J Agri Sci, vol. 75, no. 7, Jul. 2005, Accessed: Jul. 04, 2026. [Online]. Available: https://epubs.icar.org.in/index.php/IJAgS/article/view/9084