BARIK, K C, and A S CHANDEL. “Effect of Copper Levels on Growth, Grain Yield and Copper Uptake Different Varieties of Soybean (Glycine max)*”. The Indian Journal of Agricultural Sciences 71, no. 2 (April 16, 2014). Accessed October 25, 2025. https://epubs.icar.org.in/index.php/IJAgS/article/view/39556.