[Feeding of domestic ruminants on Sahelian and Sahelo-Sudanian natural pastures: methodological study in the grassland zone of Ferlo (Senegal)]

botanical composition caprin caprinos composition composition botanique conduite du troupeau crianza extensiva digestibilidad digestibility evaluation extensive husbandry food intake food preferences forraje verde fourrage vert goats grasslands grazing green feed herbage in vivo experimentation livestock management manejo del ganado nutritive value ovin ovinos parcours pascicultura pastoralism pastoralisme pastoreo praderas rangelands ruminants senegal sheep tropical zones valeur nutritive valor nutritivo zebu cattle zona tropical zone tropicale