K. C. BARIK and A. S. CHANDEL, “Effect of copper levels on growth, grain yield and copper uptake different varieties of soybean (Glycine max)*”, Indian J Agri Sci, vol. 71, no. 2, Apr. 2014, Accessed: Oct. 25, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAgS/article/view/39556