Lugo-Mercado, Héctor M., José Badillo-Feliciano, and Francisco H. Ortiz-Alvarado. “Yield Response of Watermelon, Tomato and Pigeon Pea to Land Preparation Techniques in Southern Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 71, no. 2 (April 1, 1987): 203–208. Accessed May 3, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/6942.