Figure 1 . Physical properties of the soil. The soil was sampled at different depths (a), at different slope positions (b), and in different forest types (c). SMC (%), soil moisture content; EC (µs·cm−1), electric conductivity; TDS (µg·L−1), total dissolved solid; GS (g·cm−3), specific soil weight. Forest types: NA,Camellia oleifera new afforestation; GLF, Gardenia jasminoides in a low-yielding C. oleifera forest; LF, low-yielding C. oleifera forest; GNA, G. jasminoides inC. oleifera new afforestation. Twenty, soil layer at 0–20 cm depth; Forty, soil layer at 20–40 cm depth; Sixty, soil layer at 40–60 cm depth. The data are shown as the mean ± SD. (depth and slope positon n = 9forest type n = 12; *P < 0.05, **P< 0.01, ***P < 0.001). Statistical analysis was performed using one-way analysis of variance (ANOVA), and Tukey’s multiple comparison test was used to correct for multiple comparisons.