Table 3. Type of country-specific data necessary for the Tier 2 method of IPCC GL

Source of emissions		Necessary data
Enteric fermentation	CH4	Gross energy intake (GE), methane conversion factor (MCF), percent of growth energy in feed converted to methane (Ym)
Manure management	CH4	Maximum methane production (B0), methane conversion factor (MCF), average body weight (ABW), volatile solid excretion (VS)
	Direct N2O	Average body weight (ABW), nitrogen excretion (Nex)

IPCC GL, Intergovernmental Panel on Climate Change Guidelines.