Basic Descriptive Statistics of Six Plantation Sites Along a Precipitation Gradient.

a Y and A indicate younger and older plantations, respectively. The number in the parentheses is the soil sample size in each stand.
b Y (Yes) indicates that the fine root biomass was collected in this stand. The number in the parentheses is the sample size.
c The data on soil organic carbon, total nitrogen content, and soil bulk density of some croplands were cited from other studies in the same site, and the data in the other cropland and forest stands were collected and analyzed in this paper. There was no tree census of the S5 forest stand, but the soil properties were measured.