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N2O Emissions Reductions through Changes in Fertilizer Management

N2O Emissions Reductions through Changes in Fertilizer Management

The American Carbon Registry (ACR) has published a Methodology for N2O Emissions Reductions from Changes in Fertilizer Management v2.0.

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.

Projects using this methodology must comply with all requirements of the ACR Standard, submit a GHG Project Plan for certification by ACR, and secure independent verification by an ACR-approved third-party verifier.

Process documentation:

  • Original methodology submitted to ACR for approval
  • Public stakeholder consultation comments and responses
  • Scientific peer review comments and responses
  • ACR Methodology for N2O Emissions Reductions from Changes in Fertilizer Management v1.0
  • Summary of the proposed changes from v1.0 to v2.0
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    Methodology development background papers:

  • Potential for development of a simplified methodology for N2O reductions from fertilizer management
  • Spatial analysis of GHG emissions from agriculture fertilizer usage in the U.S.
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