Soil Carbon Transition Curves: Reversal of Land Degradation through Management of Soil Organic Matter for Multiple Benefits - Soil Carbon: Science, Management and Policy for Multiple Benefits - page 32

Table 3.2. Soil carbon content (Mg C ha -1 ) in the top 30 cm of the profile under undisturbed natural vegetation for major soil groups and climatic zones, based on
means of global data sets with standardized methods; peatland data are not included. (From Batjes, 2011.)

Tropical
montane

Tropical
wet

Tropical
moist

Tropical
dry

Warm
temperate moist

Warm
temperate dry

Cool temperate
moist

Cool
temperate dry

Boreal
(undifferentiated)

Polar
(undifferentiated)

High-activity clay 51 60 40 21 64 24 81 43 63 59

Low-activity clay 44 52 38 19 55 19 76 - - -

Sandy 52 46 27 9 36 10 51 13 - 27

Spodic - - - - 143 - 128 - - -

Volcanic 96 77 - - 138 84 136 - - -

Wetland 82 49 68 22 135 74 128 - 116 -