Tables
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Table 1. SOCD and SOCS in Various Paddy Soil Subgroups in China
Soil Subgroupsa Amount of Polygon Area, M ha Percentage in Area, % SOCD of Profile, t C ha−1 SOCD of Surface, t C ha−1 SOCS of Profile, T g SOCS Percentage in Profile, % SOCS of Surface, T g SOCS Percentage in Surface, %
Hydeomophic,1 6246 23.9 52.2 114.0 39.5 2722 53.5 943.3 55.0
Submergenic, 2 4449 7.1 15.6 78.8 30.3 560.1 11.0 215.1 12.5
Percogenic, 3 3555 7.9 17.4 86.4 31.6 685.4 13.5 250.4 14.6
Gleyed, 4 2513 3.3 7.2 213.7 52.7 698.7 13.7 172.2 10.0
Degleyed, 5 469 1.7 3.7 147.2 46.6 249.5 4.9 79.1 4.6
Bleached, 6 664 1.1 2.4 77.3 30.9 82.9 1.6 33.1 1.9
Salinized, 7 215 0.6 1.4 115.3 29.5 73.7 1.5 18.9 1.1
Acid sulfate, 8 51 0.1 0.2 157.6 40.7 16.6 0.3 4.3 0.3
Total 18162 45.7 100 … … 5089 100 1716 100
aReference to WRB system: 1, hydragric anthrosols; 2, hydragric anthrosols; 3, hydragric anthrosols; 4, gleyic-hydragric anthrosols; 5, gleyic-hydragric anthrosols; 6, hydragric anthrosols; 7, hydragric anthrosols; 8, fluvic cambisols.
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Table 2. SOCD and SOCS in Various Soil Regions of China
Soil Regions Amount of Polygon Area, M ha Percentage in Area, % SOCD of Profile, t C ha−1 SOCD of Surface, t C ha−1 SOCS of Profile,a T g SOCS Percentage In Profile, % SOCS of Surface, T g SOCS Percentage in Surface, %
SCSY 4646 7.3 15.9 140.1 39.0 1018 20.0 283.3 16.5
SYNT 6279 14.7 32.2 114.5 39.6 1683 33.1 581.7 33.9
MLY 2164 12.5 27.4 97.6 35.1 1224 24.0 440.0 25.6
SBIA 1199 5.2 11.3 79.7 27.7 411.7 8.1 142.9 8.3
NC 624 2.3 5.1 108.2 37.9 253.0 5.0 88.6 5.2
YGQT 3250 3.7 8.1 135.3 48.8 498.9 9.8 179.9 10.5
Total 18162 45.7 100 … … 5089 100 1716 100
aT g = 1 × 1012 g.