Dale Ritchey, K., and Héber Irizarry. “Leaching of Mg Fertilizers in Puerto Rican Ultisols”. The Journal of Agriculture of the University of Puerto Rico 77, no. 3-4 (October 1, 1993): 167–180. Accessed March 28, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/4205.