Physical, chemical, isotopic and biological properties of bulk mineral soils (0–15 cm).

Values are means and 1 SE (in parentheses) for watershed-level composited samples for bulk density (n = 10); texture (n = 5); pH (n = 15); %C, %N, δ13C and δ15N (n = 8); and Brays-P (n = 15); and root biomass (n = 5), where the sample size (n) refers to the number of plots. For pH, the mean was calculated by averaging hydrogen ion concentrations followed by log10 back transformation. The values in parentheses are quadratic ranges. P-values are the results of two-sided t-tests.