Proceedings of the First Natural Resources Conservation Conference

agroforesteria agroforesterie agroforestry climatic change conduite des herbages conservation de la nature conservation des sols environmental impact ethiopia etiopia fertilidad del suelo forest management forest resources grassland management impact sur l'environnement impacto ambiental irrigation manejo de praderas manejo del suelo microorganisme microorganismos microorganisms mineral resources mise en valeur du sol nature conservation pollution de l'eau recursos del suelo recursos forestales recursos minerales ressource en eau ressource en sol riego salinidad salinity soil conservation soil fertility soil management soil resources vegetation water management water pollution water resources