The activity data for N₂O emissions from animal production should be consistent with other categories, such as CH₄ and N₂O from manure management and N₂O emissions from agricultural soils (animal manure applied to soils).  It is important that activity data be based on a single livestock characterization.

The required activity data are:

• The same data (livestock numbers and nitrogen excretion ratios) as those used to estimate N₂O emissions from animal waste management systems;
• For each animal species, the fraction of animal manure deposited onto soil by grazing livestock.

The methodology for N₂O emissions from animal production is addressed in the IPCC Good Practice Guidance under manure management, although emissions are accounted for under N₂O emissions from agricultural soils in the Common Reporting Format (CRF).