--- title: Proba Nitrogen Stabilizers GHG Methodology description: Explore our nitrogen stabilizers methodology to reduce emissions and enhance crop yields. Join the public consultation for feedback on this innovative approach to low-carbon agriculture. --- [![Proba. In your supply chain, we make the voluntary carbon market work for you.](https://proba.earth/hs-fs/hubfs/positive.png?width=185&height=53&name=positive.png "Proba. 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Search The PM.0004 Adoption of nitrogen stabilizers to transition to low-carbon agriculture methodology version 1.0 was officially published on July 8, 2025. We have re-uploaded the methodology as version 1.1 on December 19, 2025. Please view the methodology changes in the update log available on page 2. # Adopt nitrogen stabilizers # Adopt nitrogen stabilizers Nitrogen stabilizers are agricultural additives applied alongside fertilizers to reduce nitrogen losses and lower emissions. [Urease inhibitors](https://proba.earth/probas-blog/nitrification-and-urease-inhibitors?hsLang=en) slow the breakdown of urea, cutting ammonia loss, while [nitrification inhibitors](https://proba.earth/probas-blog/nitrification-and-urease-inhibitors?hsLang=en) delay the conversion of ammonium to nitrate, reducing leaching and nitrous oxide emissions. By keeping more nitrogen in the soil for crops to use, stabilizers boost efficiency and help cut unnecessary GHG emissions. We developed a tool to quantify and certify emission reductions when nitrogen stabilizers are adopted in agriculture - a perfect tool for [starting sustainability projects](https://proba.earth/probas-blog/how-to-start-a-ghg-project-the-step-by-step-guide-for-project-developers-and-reporting-companies?hsLang=en). ![PM.004 Methodology logo](https://proba.earth/hubfs/PM.004%20Methodology%20logo.png "PM.004 Methodology logo") ## Adoption of nitrogen stabilizers to transition to low-carbon agriculture Methodology ID: PM.0004 Date of Issue: July 8, 2025 Developer: Proba World BV [Download version 1.1](https://proba.earth/hubfs/Methodologies/PM.0004_Adoption_of_nitrogen_stabilizers.pdf?hsLang=en) Nitrogen fertilizers are essential for crop yields, but they’re also a [major source of nitrous oxide](https://proba.earth/probas-blog/why-nitrous-oxide-matters?hsLang=en) (N₂O). This methodology focuses on nitrogen stabilizers: compounds added to fertilizers to reduce nitrogen losses and cut emissions. The methodology makes it possible to issue [Scope 3 reduction certificates](https://proba.earth/impact-units?hsLang=en) for agricultural projects that use nitrogen stabilizers, such as nitrification and urease inhibitors. These certificates can then attract carbon finance to scale up the adoption of stabilizers in [agricultural systems](https://proba.earth/agri-food?hsLang=en). Contact us via [hello@proba.earth](mailto:hello@proba.earth) if you want to start a GHG project. ## Relevant documents ![Proba Document Logo](https://proba.earth/hs-fs/hubfs/Proba%20Document%20Logo.png?width=192&height=192&name=Proba%20Document%20Logo.png) ## PM.0004 Nitrogen Stabilizer Methodology GHG Methodology document to quantify emission reductions from adopting nitrogen stabilizers. [Download](https://proba.earth/hubfs/Methodologies/PM.0004_Adoption_of_nitrogen_stabilizers.pdf?hsLang=en) ![Proba Document Logo](https://proba.earth/hs-fs/hubfs/Proba%20Document%20Logo.png?width=192&height=192&name=Proba%20Document%20Logo.png) ## Expert Review - Feedback & Response This document outlines the feedback received from FoodChainID on version 0.9 of the GHG methodology. [Download](https://proba.earth/hubfs/IFA%20Stabilizer%20Methodology%20v0.9%20(expert%20review)%20Feedback%20%26%20Response.pdf?hsLang=en) ![Proba Document Logo](https://proba.earth/hs-fs/hubfs/Proba%20Document%20Logo.png?width=192&height=192&name=Proba%20Document%20Logo.png) ## Public Consultation - Feedback & Response This document outlines the feedback received during the public consultation period on version 0.95 of the methodology. [Download](https://proba.earth/hubfs/IFA%20Stabilizer%20Methodology%20v0.95%20(public%20consultation)%20Feedback%20%26%20Response%20(external).pdf?hsLang=en) ![Subheading (5)](https://proba.earth/hs-fs/hubfs/Subheading%20(5).png?width=317&name=Subheading%20(5).png "Subheading (5)") [Laan van Kronenburg 14, 1183 AS Amstelveen](https://maps.app.goo.gl/aKif8v1k5m9h2zA37)   Food companies are asking for certified Scope 3 reductions. It starts with fertilizer. 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