Table 2 Regional Analysis of Available Soils: Soil organic carbon (SOC) for all available cropland soils by region (i.e. those not excluded from the analysis as high SOC or sandy soils), showing both the regional totals and the regional averages per hectare, at current status (T0), and after 20 years for both the medium and high sequestration scenarios, and their annual increment.

From: Global Sequestration Potential of Increased Organic Carbon in Cropland Soils

Cropland Soils (30 cm depth) Soil Organic Carbon Average Soil Organic Carbon Cropland Area
Current After 20 Years Annual Increase Current After 20 Years Annual Increase
Scenario T0 Medium High Medium High T0 Medium High Medium High
Region PgC PgC/yr tC/ha tC/ha/yr km2
Australian/Pacific 3.75 4.50 5.29 0.04 0.08 57 68 80 0.57 1.16 659,834
Central America 1.22 1.37 1.52 0.01 0.02 87 98 109 0.53 1.09 139,742
Central Asia 5.01 5.40 5.81 0.02 0.04 136 146 158 0.53 1.08 369,061
East Asia 9.14 10.52 11.97 0.07 0.14 72 83 95 0.54 1.12 1,262,134
Eastern and Southern Africa 5.64 6.80 8.02 0.06 0.12 53 64 76 0.55 1.13 1,055,461
Europe 21.05 23.26 25.60 0.11 0.23 106 117 128 0.55 1.14 1,995,564
North Africa 1.51 1.83 2.17 0.02 0.03 58 71 84 0.63 1.28 258,602
North America 28.07 31.52 35.16 0.17 0.35 97 109 122 0.60 1.22 1,260,786
Russia 21.94 23.19 24.52 0.06 0.13 174 184 194 0.50 1.02 1,235,827
South America 9.42 10.72 12.09 0.06 0.13 76 87 98 0.53 1.08 1,753,039
South Asia 7.68 9.87 12.18 0.11 0.22 44 56 69 0.62 1.28 852,619
SouthEast Asia 8.15 9.06 10.03 0.05 0.09 96 106 118 0.53 1.10 1,307,174
West and Central Africa 4.83 6.35 7.95 0.08 0.16 37 49 61 0.58 1.19 891,532
Western Asia 4.38 5.44 6.57 0.05 0.11 49 61 74 0.60 1.23 2,893,928
Global 131.81 149.84 168.87 0.90 1.85 81.61 92.82 104.66 0.56 1.15 15,935,304