Nomadic pastoralists in Kenya: human ecological aspects of the East-Pokot

agricultura tradicional agriculture traditionnelle attitudes case studies comportamiento humano comportement humain conduite des herbages development policies diet dieta environmental impact estructura social exploitation agricole explotaciones agrarias farms ganado grassland management hatos herds human behaviour impact sur l'environnement impacto ambiental kenia kenya land management livestock manejo de praderas nomadism nomadisme nomadismo pastoral society pastoralism pastoralisme pastoralismo social structure sociedad pastoral structure sociale traditional farming troupeau