Fig. 4. Influence of harvest date and day on acetic acid, 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.