Valbuena-CalderónOscar, Rodríguez-PérezWilson, and Suárez-SalazarJuan. 2016. “Soil Quality under Two Different Management Schemes in Coffee Plantations of Southern Colombia.”. Agronomía Mesoamericana 28 (1), 131-40. https://doi.org/10.15517/am.v28i1.21092.