Fig. 1. Effect of herbage mass (HM) and herbage allowance (HA) on average daily gain (ADG) of heifers grazing unsupplemented limpograss pastures. (A) and (C) include data from all unsupplemented treatment–replicate combinations in both 1998 and 1999; (B) and (D) include data from unsupplemented 20- and 40-cm treatment–replicate combinations in both 1998 and 1999.