Crespo-Ruiz, Manuel, Megh R. Goyal, Carmela Chao de Báez, and Luis E. Rivera. “Nutrient Uptake and Growth Characteristics of Nitrogen Fertigated Sweet Peppers under Drip Irrigation and Plastic Mulch”. The Journal of Agriculture of the University of Puerto Rico 72, no. 4 (October 1, 1988): 575–584. Accessed April 16, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/8006.