Soil is the largest terrestrial Carbon pool, constitutes at 2500 Pg of total Carbon (organic and inorganic) within one meter depth . This soil Carbon pool is approximately two-thirds of the total Carbon in ecosystems . The former is about 3.3-fold greater than the atmospheric Carbon pool (760 Pg), and 4.5-fold greater than the biotic Carbon pool (560 Pg) . In addition, soil organic carbon (SOC) pools have the slowest turnover rates in general terrestrial ecosystems , therefore Carbon sequestrated in soils has a great potential to mitigate CO2 emission to the atmosphere .