Technical Explainer: Carbon Credits for Improved Rice Cultivation

This technical guide by RMI analyzes the voluntary carbon market (VCM) for improved rice cultivation, focusing on the transition from invalidated CDM-based credits to more rigorous new methodologies. It details the primary and secondary practices used to reduce methane emissions, evaluates quality risks such as additionality and MRV, and provides guidance for stakeholders to identify high-integrity projects.

• Rice cultivation is a major source of greenhouse gases, with flooded paddies accounting for approximately 10% of global methane emissions. These emissions occur because waterlogged fields create oxygen-poor conditions that allow methane-producing bacteria to thrive.
• The rice credit market experienced a massive collapse in 2024 when Verra invalidated 99.9% of issued rice credits (37 projects totaling 4.5 million credits). These credits, issued under a Clean Development Mechanism (CDM) methodology, were invalidated primarily due to additionality concerns and the misclassification of large-scale projects as small-scale to bypass rigorous testing.
• Newer, active methodologies—including Verra's VM0051 (2025), Gold Standard (2023), and CAR (2013)—aim to improve credit quality through more dynamic baseline-setting and robust additionality requirements. These updated standards are projected to issue four to six credits per hectare, significantly lower than the 12 to 15 credits allowed under the invalidated CDM AMS-III.AU methodology.
• Carbon credits are generated through primary practices that reduce field flooding time, such as Alternate Wetting and Drying (AWD), which can reduce methane emissions by 53% and water use by roughly 20%, as well as direct seeding (DSR) and early drainage. Secondary practices include using methanotrophs, short-duration rice varieties (SDRV), and improved nitrogen management.
• The primary quality risks for rice credits are additionality/baselines and monitoring, reporting, and verification (MRV), both rated as 'Medium concern' with 'Common' prevalence. Risks include the use of oversimplified baselines and reliance on farmer-reported data without digital verification. Conversely, leakage, permanence, and GHG accounting are considered low or negligible concerns if updated methodologies are followed.
• To ensure high integrity, buyers are advised to prioritize projects that use digital MRV (such as satellite imagery for AWD verification), employ site- or region-specific methane emissions factors rather than country-level statistics, and provide third-party attestation for additionality tests.

APA

RMI (2025). Technical Explainer: Carbon Credits for Improved Rice Cultivation. https://rmi.org/resources/technical-explainer-carbon-credits-for-improved-rice-cultivation/

Chicago

RMI. Technical Explainer: Carbon Credits for Improved Rice Cultivation. 2025. https://rmi.org/resources/technical-explainer-carbon-credits-for-improved-rice-cultivation/.

Wikipedia

{{cite report |author=RMI |title=Technical Explainer: Carbon Credits for Improved Rice Cultivation |date=30 July 2025 |url=https://rmi.org/resources/technical-explainer-carbon-credits-for-improved-rice-cultivation/ |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{rmi2025technical, author = {{RMI}}, title = {{Technical Explainer: Carbon Credits for Improved Rice Cultivation}}, institution = {RMI}, year = {2025}, month = jul, url = {https://rmi.org/resources/technical-explainer-carbon-credits-for-improved-rice-cultivation/}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }