Presentation prepared for the XXV International Grassland Congress Kentucky, USA, May 14-19. Cali (Colombia): International Center for Tropical Agriculture. 13 sl.
Otieno, M.A.; Bùi, V.T.; Phan, H.C.; Trần, T.B.N.; Mai, T.T.; Duncan, A.; Douxchamps, S.; Peters, M.