Fig. 2. Soil carbon stocks (Mg C ha−1) for each land use at different depth intervals. Values correspond to the calculated average for each land use. Abbreviations for each land use are as follows: Conventional agriculture (CON Ag), Soil and Water conservation agriculture (SWC Ag), and semi-natural vegetation sites (NAT Veg). Bars represent standard deviations from the means. Different lower-case letters within a depth interval denote significant differences between the various land uses. Different upper-case letters (right panel) denote significant differences in total carbon stocks between the various land uses (P b 0.05); ANOVA, Tukey post hoc test.