The American Carbon Registry (ACR) Methodology for N2O Emissions Reductions from Changes in Fertilizer Management is inactive and ineligible for crediting projects on ACR. The methodology relies on a performance standard additionality test that, per requirements in the ACR Standard, must be re-assessed at minimum every 5 years.
Methodology History
The methodology details requirements for quantification of GHG emissions reductions in the agriculture sector resulting from changes in how fertilizer is applied and used. It incorporates site specific data into a peer-reviewed, tested and highly parameterized model, the Denitrification-Decomposition (DNDC) model, to quantify direct N2O emissions as well as indirect emissions from leaching and ammonia volatilization.
This methodology is applicable to Agricultural Land Management (ALM) ACR project activities that involve a change in fertilizer management including changes in fertilizer rate, type, placement, timing, use of timed-release fertilizers, use of nitrification inhibitors, and other factors.
ACR has closed the public comment period and initiated scientific peer review for v2.1 of its Methodology for N2O Emission Reductions through Changes in Fertilizer Management. Upon final approval and publication this version will replace v2.0. The methodology’s purpose, scope, applicability conditions, eligible practices, and quantification approach remain unchanged overall. ACR has made updates and clarifications to improve the flexibility of the methodology by providing eligibility criteria for other greenhouse gas quantification models in addition to DNDC. Upon final approval and publication this version will replace v2.0.
