This review of national greenhouse gas (GHG) mitigation planning in the agriculture sector provides national policy makers and others in the agriculture sector with an overview of national mitigation planning processes to aid them in identifying the relevance of these processes for promoting agricultural development. It also gives policy makers and advisors involved in low-emission development planning processes an overview of mitigation planning in the agriculture sector and highlights the relevance of agriculture to national mitigation plans and actions. The review provides an overview of agreements under the United Nations Framework Convention on Climate Change (UNFCCC) on GHG mitigation in developing countries. It examines 32 low-emission development strategies (LEDS) from 18 developing countries and 62 nationally appropriate mitigatioin actions (NAMAs) in the agriculture sectors of 30 countries. It describes the status of development of the NAMAs, the agricultural activities proposed and the alignment of the NAMAs with other policies and policy goals. The report summarizes the status of and trends in national agricultural mitigation planning, the barriers and risks involved, and the opportunities and potentials for agricultural NAMAs. It also suggests an approach to NAMA development in the agriculture sector based on 12 basic building blocks.