Los costos de rehabilitacion de los suelos volcanicos endurecidos Suelos volcanicos endurecidos /Zebrowski, Claude Sanchez, B. COUT DE PRODUCTION AGRICOLE AGRICULTURE EROSION LUTTE ANTIEROSIVE DEFRICHEMENT METHODE REFORESTATION SYSTEME DE CULTURE PROPRIETE CHIMIQUE TEPETATE CANGAHUA REHABILITATION DU SOL SOL VOLCANIQUE Reclamation and conservation methods for agriculture and reforestation in indurated and eroded volcanic soils are reported. Mechanized methods used specially in the realization of progressive development terraces has lower costs than flat terraces built simultaneously to the sub-soiling. Some reforestation methods used in Mexico have a cost similar to those of reforestation in non indurated soils of Ecuador. (Résumé d'auteur). UE ORSTOM PUCE UCE /Zebrowski, Claude (ed.) /Quantin, Paul (ed.) Trujillo, G. (ed.) Villamar, M.D. (collab.) 1997 text https://www.documentation.ird.fr/hor/fdi:010012927 fdi:010012927 Zebrowski Claude, Sanchez B., . Los costos de rehabilitacion de los suelos volcanicos endurecidos. In : Zebrowski Claude (ed.), Quantin Paul (ed.), Trujillo G. (ed.), Villamar M.D. (collab.), . Suelos volcanicos endurecidos UE ; ORSTOM ; PUCE ; UCE, 1997, 462-471 Suelos Volcanicos Endurecidos, 3., Quito (ECU), 1996/12/9-14 SP MEXIQUE EQUATEUR