O. Ijoyah, M., A. O. Ogar, and G.O. S. Ojo. “Soybean-Maize Intercropping on Yield and System Productivity in Makurdi, Central Nigeria”. Scientific Journal of Crop Science 2, no. 4 (April 29, 2013): 49-55. Accessed July 23, 2024. http://sjournals.com/index.php/sjcs/article/view/1224.