2.5 Statistical analysis
SPSS®11.0 (SPSS Inc.) was used for the statistical
analysis. Preliminary analysis was first conducted and
indicated that the soil data were normally distributed.
Therefore, parametric statistics of ANOVA analysis
were used to test the significance among the agricultural
land use types at p < 0.05. If the effects of agricultural
land use types are significant, mean separations were
achieved by using a protected least significant difference
(LSD) test at p < 0.05.