The current inventory structure does not allow for the effects of mitigation strategies such as the precision application of nitrogen,
denitrification inhibitors or manipulating diet, which should also
impact emissions. To improve the precision of estimates in the UK
greenhouse gas inventory for agriculture there is a recognised need
to move towards Tier 2 and Tier 3 methods with the inclusion of
mitigation effects. In doing thiswe shall use emission factors that are
derived for UK conditions and we are likely to disaggregate the ac-
tivity data for use at finer scales than country level. Improved emis-
sion factor estimates will almost certainly have smaller uncertainty,
but conversely, further disaggregation of the activity data might
result in increased uncertainty. Our approach must be balanced.