Wahab, A. et al. 1976. 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, 3 (Jul. 1976), 329–335. DOI:https://doi.org/10.46429/jaupr.v60i3.10525.