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Table 3 Calculation of organic matter (LOI) and C-losses of profile 1

From: Formation and decay of peat bogs in the vegetable belt of Switzerland

Depth (cm) LOI (%) Bulk density (g cm−3) Thickness (cm) (1) Skeleton proportion (weight-%) Density of organic matter (g cm−3) Former thickness, primary subsidence (cm) (2) Former thickness, primary and secondary subsidence (cm) (3) LOI loss (kg m−2) C-loss (kg m−2)
0–10 72.6 0.31 10 13 0.20 22.8 30.2 17.49 9.13
10–20 72.3 0.37 10 13 0.23 26.8 30.8 17.99 9.39
20–30 72.1 0.39 10 1 0.28 32.0 35.4 21.93 11.45
30–40 68.6 0.35 10 27 0.18 20.6 29.2 16.56 8.64
40–50 76.6 0.24 10 32 0.12 14.5 20.4 8.95 4.67
50–60 83.0 0.15 10 0 0.13 14.6 21.6 10.02 5.23
60–70 88.4 0.13 10 0 0.11 13.1 14.7 4.09 2.14
70–80 90.0 0.13 10 5 0.11 13.3 12.1 1.78 0.93
80–90 82.6 0.13 10 21 0.08 9.8 17.5 6.50 3.39
90–100 83.3 0.18 10 0 0.15 17.5 21.3 9.78 5.10
100–110 84.0 0.13 10 5 0.11 12.4 19.5 8.20 4.28
110–120 88.1 0.11 10 3 0.09 10.7 14.8 4.13 2.16
120–130 92.1 0.09 10 0 0.09 10.0 10.0 0 0
130–135 76.6 0.20 5 0 0.15 8.8 14.9 4.22 2.20
       Sum of difference (cm) = (2)—(1) Sum of difference (cm) = (3)—(1) Sum (kg m−2) Sum (kg m−2)
       91.8 157.4 131.6 68.7
  1. The average, annual C loss is calculated form the sum of C losses divided by 150 years (result = 0.458 kg m−2 year−1 = 4.58 t ha−1 year−1)