From: 13C NMR spectroscopy characterization of particle-size fractionated soil organic carbon in subalpine forest and grassland ecosystems
Location
% of particle size
Very fine (<0.4 μm)
Fine (0.4–2 μm)
Small (2–20 μm)
Medium (20–53 μm)
Large (53–250 μm)
Coarse (>250 μm)
Forest
1.3
4.1
7.8
33.1
34.5
19.2
Transition
3.3
6.8
8.1
29.7
31.8
20.3
Grassland
6.6
7.5
11.1
24.3
29.9
20.6