Sotomayor-Ramírez, David, Randy Huckaba, Ricky Barnes, Ronald Dorcinvil, and Jesús Espinosa. “Inbred Maize Response to Cover Crops and Fertilizer-Nitrogen”. The Journal of Agriculture of the University of Puerto Rico 96, no. 1-2 (April 1, 2012): 37–55. Accessed December 7, 2022. https://revistas.upr.edu/index.php/jaupr/article/view/245.