Definition of 4D Agricultural Soils Source Category
Emissions and removals of CH4 and N2O from agricultural soil/land and NMVOCs from crops. These are influenced by irrigation practices, climatic variables, soil temperature and humidity. Any N2O emissions from the use of nitrogen-based fertilisers in rice cultivation should be reported here. N2O emissions may be related to the use of both organic and inorganic fertilisers, biological Nitrogen fixation, and return of crop residues to the field or to animal production. Non-CO2 greenhouse gas emissions associated with the use of compost and human waste as fertilisers should also be recorded in this category. Emissions of N2O from sewage are to be reported under Waste (6B) and N2O emissions from animal waste management systems other than grazing under manure management (4 B). Emissions of N2O from manure used for fuel are reported under the Energy Module (1 A).
United Nations Framework Convention on Climate Change (UNFCCC), Updated UNFCCC reporting guidelines on annual inventories following incorporation of the provisions of decision 14/CP.11. 2006.
Available online at: http://unfccc.int/resource/docs/2006/sbsta/eng/09.pdf
Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories: Reporting Instructions. Section 1.1, "Source/sink categories."
Available online at: http://www.ipcc-nggip.iges.or.jp/public/gl/guidelin/ch1ri.pdf