Ureste, Jesús, and Santos Campos. “Corn (Zea Mayz L.) Response to Conservation Tillage on Four Tropical Soils.”. Agronomía Mesoamericana 6 (June 2, 2016): 80-87. Accessed January 17, 2022. https://revistas.ucr.ac.cr/index.php/agromeso/article/view/24810.