Nutritive value of three tropical grasses : Eragrostis olivacea, Setaria sp and Tripsacum laxum, harvested at a growth stage as used by farmers in Burundi AG Deswysen, F. Gérard, C. Scacchi, P. Pozy, J. Gourdin, D. Dehareng and A. NivyobiziAnn. Zootech., 44 Suppl. 1 (1995) 196DOI: https://doi.org/10.1051/animres:199505164