Fig. 3. (A) Nitrogen fertilization and (B) regrowth interval effects on crude protein (CP) fraction concentrations in total CP of Tifton 85 herbage. There was no effect of N fertilization on Fraction A (P > 0.10, SE = 23), a linear increase (P < 0.05, SEM = 30) in Fraction B, and a linear decrease (P < 0.01, SE = 11) in Fraction C. There was no effect of regrowth interval on Fractions A and B. Fraction C was different (P < 0.05) between intervals.