Figure 1

CP/MAS 13 C NMR spectra for partially decomposed plant materials in 3 organic horizons (Oi, Oe, and Oa) at the (a) summit, (b) footslope, and (c) lakeshore.
CP/MAS 13 C NMR spectra for partially decomposed plant materials in 3 organic horizons (Oi, Oe, and Oa) at the (a) summit, (b) footslope, and (c) lakeshore.