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Table 3 Content of total organic C, N and C/N ratio in each particle-size fraction in different sampling locations

From: 13C NMR spectroscopy characterization of particle-size fractionated soil organic carbon in subalpine forest and grassland ecosystems

Site Particle size (μm) TOCa (%) TNb (%) C/N
Forest Coarse (>250) 19.5 1.1 17.9
Large (250–53) 15.7 1.0 16.4
Medium (53–20) 19.8 1.3 15.6
Small (20–2) 22.7 1.9 11.8
Fine (2–0.4) 25.4 2.9 8.9
Very fine (<0.4) 27.7 3.3 8.5
Transition Coarse (<250) 12.4 0.6 21.8
Large (250–53) 5.8 0.3 17.5
Medium (53–20) 8.3 0.8 10.8
Small (20–2) 11.2 0.8 14.1
Fine (2–0.4) 10.2 0.9 11.8
Very fine (<0.4) 12.5 1.1 11.4
Grassland Coarse (>250) 15.6 1.0 15.3
Large (250–53) 14.8 0.8 17.7
Medium (53–20) 9.9 0.6 16.8
Small (20–2) 19.1 1.5 12.6
Fine (2–0.4) 18.8 3.2 5.8
Very fine (<0.4) 22.3 2.3 9.9
  1. aTotal organic carbon
  2. bTotal nitrogen