See more from this Session: Conservation Practices to Mitigate and Adapt to Climate Change: I
While a variety of approaches for quantification and accounting systems of various emission/removal source categories have been proposed (e.g., broad-based emission factors vs direct measurement, regional performance standards vs ‘project-specific’ baselines), we suggest that farm-specific quantification and accounting approaches, based on farmer self-reporting and monitoring and sample-based verification procedures provide a robust approach for implementing agricultural mitigation programs. Farm-scale quantification and self-reporting could provide efficient mitigation while streamlining monitoring, verification and other transactional functions in a networked environment. A key to this approach are methods that are simple to use (without specialized training) but which can still capture fine-scale effects on GHG emissions associated with local climate and soil conditions and farm-specific land use history and current management.
We review and characterize several farm- and field-level GHG estimation tools that are available or are under development, primarily in the US and in Europe. We compare key features among systems including ease-of-use, comprehensiveness, scale and level of detail, quantification and uncertainty estimation. Scenarios for different management systems and emission sources are presented and emission estimates from the different quantification tools are compared to results from relevant field experiments.