Evolutionary abundance trends of Mg, Ca, Ti, and Fe. Mg and Ca abundances are derived from neutral lines while Ti and Fe are derived from singly ionised lines (see Table 6). The solid (green) line represents the running mean (weighted average), while dashed (blue) lines represent the standard deviation. Error bars represent statistical errors. Systematic errors are indicated in Fig. 10. Overplotted in diamonds are the UVES results from Paper I, which have been vertically shifted for easier comparison.