[Proposal for the evaluation of the relationship productivity - erosion in Venezuela]

agricultura comercial agricultura sostenible agriculture commerciale capa arable del suelo commercial farming conservation des sols couche arable crop yield cultivation cultivo depth evaluation forecasting land productivity methode methods perfil del suelo pratique culturale precipitation productividad de la tierra profil du sol profondeur profundidad rendement des cultures rendimiento de cultivos soil chemicophysical properties soil conservation soil profiles top soil venezuela water erosion