Republic of Korea: agricultural survey and demonstration in selected watersheds, final report. Vol 1, general report

aerial surveying agricultural development agricultural economics agronomia agronomie agronomy almacenamiento de agua clima climat climate conduite des herbages cost analysis cultivo en terrazas culture en terrasse drainage systems economic situation erosion control forest land geologia geologie geology grassland management hidrografia hydrographie hydrography instalaciones de almacenamiento installation de stockage land use manejo de praderas methode methods planification planning plant production reconocimiento de suelos red de drenaje soil surveys stockage d'eau storage structures terrace cropping terrain forestier tierras forestales topografia topographie topography utilisation des terres water storage