University of Idaho Probes Deep Soil Carbon Storage

Researchers are investigating how rising temperatures affect carbon levels in soil depths rarely studied by scientists.

Updated on Oct. 28, 2026 in Environmental

A vertical cross-section of a soil column core reveals distinct layers of earth and sediment, highlighting the complexity of subterranean soil structure. — University of Idaho researchers are using specialized deep soil ecotrons to analyze subterranean carbon storage, a critical factor in predicting global climate change impacts. AI Illustration. Upload story photo >

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University of Idaho doctoral student Gabrielle Feber is using the school's Deep Soil Ecotron to analyze carbon storage in soil columns extending 10 feet deep. The research, featured in the journal Geoderma in February 2026, focuses on deep soil layers that reach an average U.S. depth of 66 feet.

Why it matters

While most soil studies analyze the top five feet of ground, deep soil plays a critical role in food production and environmental carbon storage. Understanding these layers is essential for predicting how rising global temperatures will impact the release of carbon dioxide from the earth.

The Deep Soil Ecotron utilizes 24 eco-units containing nine-ton intact soil cores that are 10 feet tall and 3 feet wide. Feber also developed a reactive transport model in collaboration with the Lawrence Berkeley National Laboratory to process the data.

The players

Gabrielle Feber

She is a doctoral student at the University of Idaho leading the research on deep soil carbon storage.

University of Idaho

This is a public research university that operates the Deep Soil Ecotron in Moscow, Idaho.

Lawrence Berkeley National Laboratory

It is a Department of Energy national laboratory that partnered with Feber to develop a soil reactive transport model.

The details

Researchers manipulate climate, plant communities, and soil types within the specialized eco-units to observe interactions. By analyzing these massive intact cores extracted from the Sandpoint Organic Agriculture Center, the study fills a massive gap in environmental science regarding deep subterranean carbon.

February 2026: The journal Geoderma published Feber's soil depth research.
October 2026: Current date of reporting.

The Big Picture

This study marks a paradigm shift in soil science by moving beyond the surface-level focus of the University of Idaho Deep Soil Ecotron. It challenges the legacy hypothesis that soil carbon storage can be accurately predicted by studying only the top five feet of the earth.

This research could eventually lead to more accurate climate models that inform agricultural policy and carbon sequestration strategies. These findings may eventually help farmers manage land in ways that maximize carbon storage and maintain long-term soil productivity.

The takeaway

Understanding how carbon reacts to heat deep underground is vital for future environmental planning. Readers can monitor how emerging soil science impacts regional land use and agricultural sustainability policies.