Manure associated nitrous oxide emissions

The category represents the Tier 1 data and calculation methods recommended in the 2006 IPCC Guidelines for National Greenhouse Gas Inventories (Volume 4, Agriculture, Forestry and Other Land Use).

Direct N₂O emissions are based on data describing typical nitrogen (N) excretion rates (per livestock mass/head) associated with specific livestock types as well as N => N₂O emissions factors associated with each particular method of manure management.

Indirect N₂O emissions (which arise from the loss of the volatile N component from the manure) are based on data describing the proportion of manure N loss through volatilisation for each livestock and manure management type, as well as an emission factor for N₂O emissions from atmospheric nitrogen sources. Data on the fraction of manure N lost through volatilization is not provided for all combinations of livestock type and manure management method in the primary source documentation. Where possible, Discover returns the sum of both direct and indirect N₂O emissions. Otherwise, the returned values represent direct emissions only.

• Cattle and swine

• Fur-bearing livestock

• Poultry

• Other livestock