Martínez, Gustavo A., David Sotomayor-Ramírez, and José A. Castro. “APPLICATION OF THE CARIBBEAN P INDEX TO SOILS RECEIVING ORGANIC AMENDMENTS”. The Journal of Agriculture of the University of Puerto Rico 86, no. 3-4 (October 1, 2002): 145–154. Accessed December 22, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/3056.