The C:N ratios in the mineral soil to a 45 cm depth were not significantly different between vegetation types in either set of vegetation pairs. For Pasture–Broadleaf blocks, C:N ratios averaged 14.8 ± 0.1 for broadleaf plantations and 14.6 ± 0.1 for pasture. In Broadleaf–Conifer blocks, C:N ratios were 13.4 ± 0.1 for broadleaf and 13.7 ± 0.1 for conifer plantations. There was a significant depth-dependent relationship in the Broadleaf–Conifer plots, with C:N ratios decreasing with depth from 14.7, to 13.2, to 12.8 from 0 to 15 cm, 15 to 30 cm, and 30 to 45 cm, respectively. However, there was no depth-dependent relationship in the Pasture–Broadleaf plots with C:N ratios of 14.8, 14.7, and 14.8 from 0 to 15 cm, 15 to 30 cm, and 30 to 45 cm, respectively.