Lugo-Mercado, Héctor M., José Badillo-Feliciano, and Francisco H. Ortiz-Alvarado. 1987. “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 (2):203-8. https://doi.org/10.46429/jaupr.v71i2.6942.