Fig. 5. Influence of chop and species (a) and harvest date and species (b) on total acids, g kg^–1 of DM. Vertical bars indicate standard error of the mean. Harvest dates were 14 May 2004 and 25 May 2004 for orchardgrass, 17 May 2004 and 1 June 2004 for reed canarygrass, and 19 May 2004 and 28 May 2004 for tall fescue.