Fig. 4. The CENTURY-simulated annual aboveground biomass under two management scenarios: (A) clippings returned and annual fertilization rates of 150, 100, 75, and 60 kg N ha^-1 during 1 to 10, 11 to 25, 26 to 50, and 51 to 100 yr after turfgrass establishment, respectively; and (B) clippings removed and annual fertilization rates of 200, 150, and 140 kg N ha^-1 for the periods of 1 to 10, 11 to 50, and 51 to 100 yr after turfgrass establishment, respectively.