Evaluation and Mapping of Tropical African Rangelands

30 ACANE aerial Africa analysis Andropogon Andropogon gayanus animals areas arid assessment average Bamako biological types biomass BOUDET carrying capacity cattle climatic cover cutting intervals digestibility drought dry matter dry season ecological ecosystem Elymandra erosion ERTS estimated Etude evaluation factors forage formations fourragères g/m² Graminaceae grass grassland grazing growth Gwynne hectares herbaceous HOUEROU Hyparrhenia Hyparrhenia rufa isohyet IVTDOM Kenya km² land system legumes ligneous livestock Loudetia Mali maps ment methods Miméogr monitoring National necessary Niono nitrogen pasture pasturelands pâturages percent perennial period plant possible potential precipitation primary productivity problem programme rain rainy season range condition rangeland RED EARTH GN2.12 région regions Sahel Sahelian sampling satellite Savane savannah scale semi-arid Serengeti Serengeti National Park shrubs soil species steppe stocking rate structure Sudanian surface survey Table techniques tion tropical Tunisie types units vegetation woody yield zone