How much carbon can regenerative agriculture actually store?
The short answer is that it can store a meaningful amount, but the numbers vary widely by practice and location. A global meta-analysis of 345 measurements found that all seven common regenerative practices—like cover cropping, no-till, and agroforestry—effectively increased the rate of carbon sequestration, with no single practice being statistically better than the others [2]. In croplands, no-till farming increased soil organic carbon by 11.3% in the top 20 cm of soil, while cropping system intensification (growing more crops per year) boosted it by 12.4% [1]. These percentages translate to real carbon storage, but they are not infinite: the rate of carbon accumulation slows down over time as the soil reaches a new equilibrium, typically within a few decades [4].
In a specific regional study in Vermont, USA, converting farmland to rotational grazing offered the highest sequestration potential among regenerative practices, adding 1,269 kilotons of carbon—a 5.3% increase above current stocks after ten years [5]. For comparison, letting farmland revert to old-growth forest stored even more carbon (6.5% increase over ten years) [5]. So, while regenerative agriculture can sequester carbon, it is not a silver bullet; it works best as part of a broader land-use strategy.
Does climate change undermine the carbon benefits?
Yes, climate change is a major wildcard that can significantly reduce the carbon sequestration potential of regenerative agriculture. A modeling study in Vermont found that when projected climate change (rising temperatures) was factored in, soil carbon stocks decreased by 9.1% to 19.9% across all management scenarios compared to a static climate [3]. This means that even with regenerative practices like no-till or cover cropping, soils could still lose carbon overall by the end of the century because warmer temperatures accelerate the decomposition of organic matter [3].
However, not all practices are equally vulnerable. The same study found that rotational grazing could maintain or slightly increase soil carbon through 2099 even under climate change, while afforestation (planting trees on farmland) could increase statewide carbon stocks by up to 4.5 million tons [3]. The key takeaway is that regenerative agriculture is still crucial—not necessarily for massive net sequestration, but for preventing the even larger carbon losses that would occur under conventional farming in a warming world [3].
Which practices work best, and where?
The effectiveness of regenerative practices depends heavily on the region and the specific combination of methods used. In Southeast Asia, a review of 92 studies found strong evidence that organic amendments like biochar, compost, and manure, as well as cover cropping and conservation tillage, increase soil carbon [6]. However, a catch emerged: adding compost and manure also increased emissions of other greenhouse gases like methane and nitrous oxide, which could offset the carbon gains [6]. This highlights the need to measure the full greenhouse gas balance, not just soil carbon.
In the U.S. Upper Midwest, a scoring system that ranked farms based on the number of regenerative practices they used found that higher scores correlated with increased soil organic matter, total soil carbon, and water infiltration rates [7]. Interestingly, corn yields were slightly lower on more regenerative farms, but profits were higher, likely due to reduced input costs [7]. In almond orchards in California, yields were unaffected by regenerative practices, while profits increased [7]. This suggests that the economic case for regenerative agriculture can be strong, even if carbon sequestration rates are modest in some contexts.
Combining practices can amplify the benefits. For example, integrating no-till with livestock grazing increased particulate organic carbon by 38.1%, and combining cropping intensification with livestock grazing boosted mineral-associated organic carbon (a more stable form) by 33.1% to 53.6% [1]. This means that farmers who layer multiple regenerative practices—like cover crops, no-till, and animal integration—are likely to see the greatest carbon gains.
Sources used in this answer
Restoring particulate and mineral-associated organic carbon through regenerative agriculture.
A global meta-analysis found that no-till and cropping intensification increased soil organic carbon by 11.3% and 12.4% in topsoil, and combining no-till with livestock grazing boosted particulate organic carbon by 38.1%.
Quantifying soil carbon sequestration from regenerative agricultural practices in crops and vineyards
A review of 345 measurements found all seven regenerative practices (e.g., cover cropping, no-till) increased carbon sequestration rates, with no significant differences among them.
Integrating climate change into projections of soil carbon sequestration from regenerative agriculture
Modeling in Vermont showed that climate change could reduce soil carbon stocks by 9.1% to 19.9% under regenerative scenarios, though rotational grazing could still maintain or slightly increase carbon.
A Vision toward Regenerative Organic Agriculture to Sustain Climate Change and Combat Global Warming
The rate of soil carbon increase from regenerative practices is transient and slows as a new equilibrium is reached; vermicomposting reduced greenhouse gas emissions compared to landfill.
Soil carbon sequestration through regenerative agriculture in the U.S. state of Vermont
In Vermont, rotational grazing sequestered 1,269 kt of carbon (5.3% above current stocks) after ten years, while afforestation stored 6.5% more carbon.
A synthesis of the effect of regenerative agriculture on soil carbon sequestration in Southeast Asian croplands
In Southeast Asia, organic amendments like biochar and compost increased soil carbon, but also raised methane and nitrous oxide emissions, potentially offsetting gains.
Defining and validating regenerative farm systems using a composite of ranked agricultural practices
A practice-based scoring system showed that farms using more regenerative practices had higher soil carbon, water infiltration, and profits, though corn yields were slightly lower.