In a new literature review released this week, University of Wyoming scientists say the scientific community has largely ignored a key piece of the climate puzzle: the ability of grazing soils to store carbon while cattle emit methane. The review, published in the New Zealand Journal of Agricultural Research, examined 82 peer‑reviewed papers that measured methane from beef cattle on pastures around the world.
Research gap identified
Only two of the 82 studies evaluated soil carbon sequestration and animal methane emissions at the same time. Both of those papers suggested that, under certain grazing‑management regimes, the carbon stored in soil could more than offset the methane released by the herd. Lead author Nicki Nimlos, a UW Extension state range‑management specialist, called the finding “an important gap” that points to a promising research direction.
Why the gap matters
Beef cattle are the single largest source of methane among domesticated animals, accounting for roughly 18% of the United States’ total methane output. Existing mitigation ideas—dietary additives, genetic selection, even methane taxes—can be costly or difficult to implement on a broad scale. By contrast, improving grazing practices to boost soil carbon could be a more practical, land‑based solution.
Potential impact of soil carbon
The review notes that better understanding of soil carbon dynamics could help refine grazing strategies such as rotational grazing or the use of organic amendments. One of the cited studies reported that such practices could cut beef‑cattle methane emissions by nearly 50%. If soil carbon sequestration can reliably capture enough carbon to balance or exceed those emissions, the net climate impact of grazing lands could shift from a source to a sink.
Calls for more integrated research
Nimlos and her colleagues argue that future studies need to measure three components together: grazing management, animal emissions, and soil carbon changes. Standardizing measurement techniques across these domains would produce more comparable data, making it easier for policymakers and producers to assess the true carbon balance of beef operations.
Implications for policy and producers
While the review does not prescribe specific regulations, it suggests that policymakers should consider supporting research that integrates soil carbon accounting into existing livestock‑emission frameworks. For ranchers, the findings reinforce the value of management practices that enhance soil health—not only for pasture productivity but also for climate stewardship.
Next steps
The authors have made the full review available online and invite scientists, extension agents, and interested producers to explore the data. For more information, readers can contact Nicki Nimlos at [email protected] or visit the review’s web page.
Original reporting: Sheridan Media (Sheridan WY) — read the source article.
