The non-permanence of optimal soil carbon sequestration
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Carbon sequestration in agricultural soils is considered as an option of greenhouse gas
mitigation in many countries. But, the economic potential is limited by the dynamic
process of saturation and the opportunity cost of land use change. In addition, this
article shows that permanence cannot, in general, be achieved in the strict sense of
maintaining the soil carbon stock on an increased equilibrium level. Rather, a cyclical
pattern with periodical release of sequestered carbon can be economically optimal from
both the farmers’ and societal point of view.