1 23 Agroforestry Systems An International Journal incorporating Agroforestry Forum ISSN 0167-4366 Agroforest Syst DOI 10.1007/s10457-016-0030-0 Effects of soil physical and chemical parameters, and farm management practices on arbuscular mycorrhizal fungi communities and diversities in coffee plantations in Colombia and Mexico Raúl Hernando Posada, Marina Sánchez de Prager, Gabriela Heredia-Abarca & Ewald Sieverding