Subjects: | ECONOMIC GEOGRAPHY,
HYDROGRAPHY,
GEOLOGY,
SOIL,
METEOROLOGY,
CLIMATE,
FLORA,
FAUNA,
DROUGHT,
WATER USE,
HUMAN POPULATION,
SOCIOECONOMIC ORGANIZATION,
AGRICULTURE,
LIVESTOCK,
ANIMAL PRODUCTION,
CROPS,
FARMING SYSTEMS,
APPROPRIATE TECHNOLOGY,
HEALTH,
ENERGY,
EDUCATION,
FISHERIES,
FORESTRY,
SOIL CONSERVATION,
CHAD,
MALI,
MAURITANIA,
NIGER,
SENEGAL,
SUDAN,
ETHIOPIA,
BURKINA FASO,
GEOGRAPHIE ECONOMIQUE,
GEOGRAFIA ECONOMICA,
HYDROGRAPHIE,
GEOLOGIE,
SOL,
METEOROLOGIE,
CLIMAT,
FLORE,
FAUNE,
SECHERESSE,
UTILISATION DE L'EAU,
POPULATION HUMAINE,
ORGANISATION SOCIOECONOMIQUE,
BETAIL,
PRODUCTION ANIMALE,
PLANTE DE CULTURE,
SYSTEME D'EXPLOITATION AGRICOLE,
TECHNOLOGIE APPROPRIEE,
SANTE,
ENERGIE,
HIDROGRAFIA,
GEOLOGIA,
SUELO,
METEOROLOGIA,
CLIMA,
SEQUIA,
USO DEL AGUA,
POBLACION HUMANA,
ORGANIZACION SOCIOECONOMICA,
AGRICULTURA,
GANADO,
PRODUCCION ANIMAL,
CULTIVOS,
SISTEMAS DE EXPLOTACION,
TECNOLOGIA APROPIADA,
SALUD,
ENERGIA,
EDUCACION, |