Valbuena-Calderón, O. E., Rodríguez-Pérez, W., & Suárez-Salazar, J. C. (2016). Soil quality under two different management schemes in coffee plantations of southern Colombia. Agronomía Mesoamericana, 28(1), 131–140. https://doi.org/10.15517/am.v28i1.21092