Wahab, A., H. Talleyrand, and M. A. Lugo-López. “Rooting Depth, Growth and Yield of Sorghum As Affected by Soil Water Availability in an Ultisol and an Oxisol”. The Journal of Agriculture of the University of Puerto Rico 60, no. 3 (July 1, 1976): 329–335. Accessed December 22, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/10525.