TY - GEN AU - TENGE, Albino John Mkavidanda AU - ED - Université de Wageningen TI - Participatory appraisal for farm-level soil and water conservation planning in west Usambara highlands, Tanzania SN - 90-8504-165-1 CY - Wageningen KW - ALTITUDE KW - EROSION KW - ANALYSE DE COUT KW - WEST USAMBARA HIGHLANDS KW - TANZANIA KW - Agronomie KW - Economie, Socio-Anthropologie et Communication N1 - Thèse de Doctorat ER -