Fig. 1. Fitted curves for rumen ammonia concentration of previously-fasted sheep grazing white clover (——), perennial ryegrass (– - – -), Lotus corniculatus (— - - —), perennial ryegrass followed by white clover (. . . . .), or white clover followed by perennial ryegrass (– – – –) for 2 h (0–120 min). Data are adjusted for the crude protein intake (CPI) of individual sheep. From Marotti (2004).