The NDF content of the different forages ranged from 320 g/kg (Trial 7) to 810 g/kg of DM (Trial 8), the DM content from 360 g/kg (Trial 6) to 920 g/kg (Trial 8), the ADL to NDF ratio from 0.05 to 0.18 (Trial 7) and the concentrate to forage ratio from 0.0 (Trials 7 and 8) to 0.08 (Trial 6). For Trials 1 and 2 early harvest occurred 21 and 11 days before late harvest