Sequestration of soil organic carbon
Soil organic carbon is a major global reservoir of carbon. Intensive cultivation of undisturbed land releases a large proportion of that carbon due to enhanced levels of microbial activity. Between a quarter and a third of all GHG emissions since 1850 have come from this source. The process is reversible so the possibility exists for cultivated land to be managed in order to sequester and store carbon through low cultivation techniques such as reduce till and no till. Care is required as these practices can lead to enhanced emissions under certain circumstances. Furthermore, weed control can be a major issue although herbicide tolerant crops (both genetically modified and traditionally bred) and selective herbicides offer potential solutions.
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