N₂O from manure management

When reviewing this category, you should check:

• If N₂O emissions from manure management are identified as a key category, whether emissions from “significant” animal species have been estimated using an enhanced livestock characterization;
• Whether manure emissions from all livestock populations and all types of manure management systems (e.g., deep litter stables) have been accounted for;
• Whether country-specific emission factor values have been used (e.g. nitrogen excretion ratios);
• Whether the basis of these data are well documented, representative of country-specific conditions and how they compare with IPCC default values;
• If default values (instead of country-specific data) were used for some or all species, whether these values are applicable to the national circumstances;
• Whether N₂O emission estimates have been corrected for ammonia volatilization;
• Whether changes in livestock population categories and in the types of manure management systems used over time have been addressed. These changes should also be reflected in the emissions time series;
• Whether the amount of nitrogen (N) produced by manure management systems, per animal species, is consistent with the value obtained multiplying the population by typical nitrogen excretion rates. Any differences in these values should be explained by the use of specific livestock practices.
• Whether the total quantity of nitrogen produced in manure is consistent with the nitrogen lost by volatilization, applied in soil as fertilizer or during grazing (Animal Production), or used for other purposes (e.g., energy source, construction, and animal fodder)

Reference:
IPCC Good Practice Guidance, Section 4.4