Quiles-Belén, Adolfo, Antonio Sotomayor-Ríos, and Salvio Torres-Cardona. “Corn Response to N Applications and Population Densities at Two Locations in Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 72, no. 1 (January 1, 1988): 127–139. Accessed April 26, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/6842.