Figure 4. Dry matter yield, and crude protein (CP), neutral detergent fiber (NDF), and acid detergent fiber (ADF) concentrations of alfalfa (Medicago sativa) harvested for hay as a function of length of regrowth interval.
Graph showing alfalfa dry matter yield gains decreasing around day 34. Crude protein decreases between days 28 and 40, while acid and neutral detergent factors increase.

Adapted from Kallenbach et al. 2002.