Calculation of atmospheric nitrogen emissions from crop residues in Norwegian agriculture

The calculation of atmospheric nitrogen emissions from crop residues in Norwegian agriculture has been developed by Carbon Limits.

The model is built on the previously used model, developed by Bioforsk and operated by Statistics Norway (SSB). The model allows to calculate N content from different types of crop residues as well as the associated N2O and NH3 emissions per year.

The calculations follow Tier 1 methodology and are based on the equations updated by the 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories.

The report describes the methodology implemented in the updated model, the most important changes from the previous version of the model, as well as the main input data and factors used.