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Soil is the largest carbon reservoirs of the terrestrial carbon cycle. Soil, if managed properly, can serve as a sink for atmospheric carbon dioxide. As the atmospheric CO2 concentration continues to increase globally, more attention is being focused on the soil as a possible sink for atmospheric CO2. There is every possibility that atmospheric carbon dioxide concentration would increase in the near future. Under such circumstances, soil will remain a potent sink for atmospheric carbon-dioxide. The total quantity of CO2-C exchanged annually between the land and atmosphere as gross primary productivity is estimated at ~120 Gt Cyr-1 and about half of it is released by plant respiration. Soils are the largest carbon reservoirs of the terrestrial carbon. Soils contain 3.5% of the earth’s carbon reserves, compared with 1.7% in the atmosphere, 8.9 in fossil fuels, 1.0% in biota and 84.9% in the oceans. Furthermore, higher carbon stabilization in soil is benefitting the other ecosystem functioning like improvement in soil structure, water holding capacity, nutrient retention, buffering capacity and greater availability of substrates for soil organisms.

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Carbon sequestration.pdf