Co-benefits of regenerative agriculture
Biodiversity, water retention, soil health, climate resilience: impact beyond carbon
A regenerative soil project does not just sequester carbon. Biodiversity +34 %, water retention +354,000 L/ha per +1 % of organic matter, input reduction: these co-benefits are measurable and change a credit's value.
Carbon is only one dimension of a regenerative project's impact. Biodiversity, water, soil health and climate resilience are measurable too. For a buyer, these co-benefits set a soil credit apart from an avoidance or technology credit: they tell a complete territorial story.
Biodiversity: +34 % overall abundance, +201 % earthworms, +457 % vascular plants.
Water retention: +354,000 L per hectare per +1 % of soil organic matter.
Soil health: structure, infiltration, erosion resistance, natural fertility.
Climate resilience: yields better maintained in dry years.
Why talk about co-benefits?
A carbon credit does not carry equal weight depending on what comes with it. A tonne of CO₂ removed via geological DAC only carries the tonne. A tonne removed through a regenerative soil project carries the tonne plus a territorial transformation: enhanced biodiversity, improved hydrology, economic support for farmers, drought resilience. These co-benefits are not accessory. They are explicitly recognised by standards (Gold Standard's Safeguarding Principles, Verra's SD VISta), required by some corporate buyers (food groups sourcing from the territories concerned), and acknowledged by reporting frameworks (ESRS E4 on biodiversity, ESRS E3 on water). Co-benefits change the economic value of a credit by justifying a price premium.
Biodiversity: measured numbers
Regenerative agriculture produces documented, significant biodiversity effects. A study in Nature Communications Earth & Environment (2024) compares species abundance on regenerative vs conventional farms: +34 % overall abundance across species. Broken down by group: earthworm abundance +201 %, vascular plant species +457 %, bird species +197 %. Earthworms in particular are a key indicator: they restructure soil, mix organic matter, and their high density signals a functional soil. Another meta-analysis (Frontiers in Sustainable Food Systems 2025) confirms these magnitudes across European agricultural contexts. For buyers, these figures give the biodiversity narrative a measurable foundation.
Water: the soil as sponge
Soil organic matter acts as a sponge. The USDA NRCS (Natural Resources Conservation Service) quantifies the effect: every +1 % of soil organic matter raises water-holding capacity by about 354,000 litres per hectare at 30 cm depth on silt loam soils. Hudson (1994) already showed that a 4 % organic matter soil holds more than twice the water of a 1 % soil. On the ground, that means regenerative plots show better rainfall infiltration (less runoff and erosion), better drought resistance (water stays available longer for the plant), and reduced irrigation dependence. For territories under growing hydric stress, it is a strategic advantage. On reporting, ESRS E3 (Water and marine resources) requires large companies to document their watershed impact: a soil project improving local hydrology is a documentable asset.
Soil health and fertility
Beyond carbon and water, regenerative agriculture transforms soil health. Four dimensions are documented. (1) Structure: organic matter stabilised by mycorrhizae and earthworms forms porous aggregates resistant to compaction. (2) Biological activity: microbial biomass rises sharply, often by 50 to 100 % vs conventional soils. (3) Natural nutrition: microbes mineralise organic matter into assimilable nutrients (nitrogen, phosphorus), reducing synthetic fertiliser needs. A recent meta-analysis documents an average 20 to 30 % reduction in chemical inputs on mature regenerative farms. (4) Disease resistance: a living soil hosts microbial diversity that limits soil-borne pathogen progression. These effects are cumulative and reinforce over time: the longer the system has been in place, the more the co-benefits compound.
Climate resilience: holding up against droughts
Climate resilience is measured year by year. During a drought episode, regenerative plots typically hold yields 10 to 30 % higher than nearby conventional plots. The mechanism combines better water retention (see previous paragraph), deeper rooting from permanent cover practices, and microbial activity that maintains nutrient availability even under stress. Extreme climate events are growing more frequent: EU droughts 2018-2019, French heatwaves 2022 and 2023. A regenerative plot does not become immune, but its loss curve is shallower. For farmers, this resilience is an economic viability argument. For buyers sourcing in the same territories, it is a supply security argument.
Agronomic gain: why earthworms matter
Earthworms are an immediate biological indicator. A 2024 study in Nature documents their yield effect: high-density presence is associated with yields up to 25 % higher through improved nutrient cycling, soil structure and infiltration. A soil with 200 worms/m² restructures itself every year, with galleries that drain water and incorporate organic matter. A soil with fewer than 50 worms/m² is a soil progressively asphyxiating. The measurement is simple (a 25×25×25 cm soil cube, manual counting), and it is now required by some soil health protocols. For buyers, asking for a project's average earthworm density across plots is a quick seriousness test.
How standards integrate co-benefits
Three approaches coexist across standards. (1) Gold Standard integrates co-benefits via its Safeguarding Principles & Sustainable Development Goals framework: every project must document impact on at least three SDGs, with biodiversity (SDG 15) and water (SDG 6) frequently chosen. (2) Verra offers a complementary SD VISta label, independently certified, that documents co-benefits beyond carbon. It is a tradable asset that can sit alongside the carbon credit. (3) In France, Label Bas-Carbone requires a documented co-benefits section in its Grandes Cultures methodology, without separate certification. For buyers aiming at a strong biodiversity or water narrative, requesting SD VISta certification or a Gold Standard Safeguarding file provides independent proof useable in reporting.
Documenting co-benefits for CSRD reporting
CSRD requires large companies to report across five environmental dimensions: climate change (E1), pollution (E2), water (E3), biodiversity (E4), circular economy (E5). A regenerative soil project is unique in the carbon market because it contributes simultaneously to E1 (carbon sequestration), E3 (water retention, infiltration, reduced runoff) and E4 (biodiversity). A buyer who documents their project rigorously can therefore feature it in several ESRS sections, where a DAC or avoidance credit only covers E1. This crosscut is a strong argument for CSR managers structuring a portfolio coherent with their double materiality. For reporting valuation, always ask the project proponent for quantified indicators on each dimension: tonnes CO₂eq for E1, % runoff reduced or L of water retained for E3, species abundance for E4.
The territorial narrative: communicating to stakeholders
Beyond reporting, co-benefits shape the corporate narrative. A company contributing to a soil project in a region where it operates or sources can tell that story to employees, customers, investors and local regulators. It is a much more tangible communication asset than a geographically dispersed credit. In practice, communication around a soil project rests on four pillars: field photos (plots, farmers, farms), measured numbers (tonnes, biodiversity, water), testimonials from direct beneficiaries (project proponents, partner farmers), and SDG alignment (typically 5 to 8 SDGs activated by a soil project). This communication material is what distinguishes, in the 2026 market, buyers who simply buy tonnes from those building a territorial engagement strategy.
The US NRCS estimates that +1 % of soil organic matter equals +354,000 litres of water retained per hectare. Over 100 ha, that is more than 35 million litres of extra water available for crops.
Frequently asked questions
Sources & official references
- Nature Communications Earth & Environment (2024): Biodiversity in regenerative farms
- Hudson B.D. (1994) Soil organic matter and available water capacity, Journal of Soil and Water Conservation
- USDA NRCS : Soil Health and Water Holding Capacity
- Gold Standard : Safeguarding Principles & Requirements
- Verra SD VISta
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