Solar LTE (left column) and non-LTE (S_H = 0.1, right column) Fe abundances from the Fe i (open circles) and Fe ii (filled circles) lines plotted as a function of E_exc (top row) and W_obs (bottom row). The mean abundances derived from the Fe i and Fe ii lines along with their standard deviations are quoted in the top row panels. The dotted line indicates the mean abundance derived from the Fe i lines and the shaded grey area its statistical error. In the bottom row panels, the dashed line shows the calculated trend of log ε_FeI versus W_obs. Everywhere, gf-values indicated in Table 5 were used.