Figure 2

CP/MAS 13 C NMR spectra for soil organic matter in different particle-size fractions from the O/A horizon at the (a) summit, (b) footslope, and (c) lakeshore.
CP/MAS 13 C NMR spectra for soil organic matter in different particle-size fractions from the O/A horizon at the (a) summit, (b) footslope, and (c) lakeshore.