Proper soil conservation techniques such as avoiding plowing and leaving crop residue on the ground can help keep more of the carbon in the soil.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/warmer-soil-releasing-more-carbon-worsening-climate-change
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/soil-resources
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/global-warming
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/carbon-dioxide
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-impacts