Fig. 2. Apparent electrical conductivity (ECa) classes and (a) clay content (0–90 cm), (b) total C (0–90 cm), (c) topsoil depth, and (d) total dissolved solids content (0–90-cm). Bars followed by the same letter within ECa classes are not significantly different (p < 0.05). Error bars represent ± one standard error of the mean.