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Global climate change is the crucial environmental issue of the twenty first century for all of the countries in the world (Intergovernmental Panel on Climate Change [IPCC], 2001). Temperature change has already been reported from the many observations (Lal, 2004). IPCC (2001) reported that global temperature increased 0.6oC during the twentieth century. The carbon cycle is involved in the cause and remediation of the global climate change (Scholes and Noble, 2001). Carbon dioxide concentration in atmosphere has rapidly increased for the last century mainly because of fast increasing in fossil fuel consumption (Lal, 2004). There is no absolute solution to address global warming problem except stopping use of fossil fuel. Unfortunately, current technology doesn’t provide enough alternative energy source, that can replace the fossil fuels. Reduced consumption of fossil fuels may be the long‐term goal for mitigating global climate change and other solutions could be temporary or short‐term (Lal et al., 2004). Prior to industrial development, deforestation and land cultivation were the main sources of carbon dioxide (CO2) emission (West and Post, 2002). Numerous studies found that plant and soil could be either sources or storages of carbon dioxide in atmosphere (Robert, 2006). Kyoto protocol addressed that carbon sequestration in agricultural soils was accepted to store carbon into the soils (Lal, 2004). What does carbon plays in the soils? Organic carbon originally comes from plant residues and returning capacity is depending on moisture, temperature, and nutrients. Micro‐organism decomposes fresh organic materials and emits carbon dioxide into atmosphere through respiration (Bernoux, 2006). In natural ecosystem, atmospheric carbon dioxide concentration and soil organic carbon may sustain a natural equilibrium without any external impacts.