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Deep-rooted grass stores significantly more carbon, says new study

Phys · · 457 words · By Jim Shelton
Sustainable Agriculture/Carbon Sequestration

A new study published in Earth's Future found that deep-rooted grasses, such as switchgrass, store significantly more carbon in their root biomass compared to shallow-rooted annual crops. The research, conducted across nine U.S. states, suggests that perennial grasses could be beneficial for soil health, carbon storage, and as an alternative biofuel source. The study details the methodology, which involved analyzing over 700 soil core samples.

open_in_new Read the original article: https://phys.org/news/2026-04-deep-rooted-grass-significantly-carbon.html

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

psychologyDetected Techniques

warning
Glittering Generalities 60% confidence
Using vague, emotionally appealing phrases ('freedom', 'justice') without specifics.

fact_checkFact-Check Results

10 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

check_circle Corroborated 5
info Single Source 3
help Insufficient Evidence 2
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“Soil biologist Eric Slessarev... is the first author of a new study in Earth's Future showing that deep-rooted grasses store significantly more carbon in their root biomass than shallow-rooted crops—without harming the existing organic material already in the ground.”
CORROBORATED
Multiple web search results report that deep-rooted grasses store significantly more carbon in their root biomass than shallow-rooted annual crops, specifically citing an increase of 0.58 metric tons of carbon per hectare, and that this enhanced storage does not deplete existing soil organic material. This is reported across different search snippets.
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web search NEUTRAL — Carbon in the Earth's atmosphere exists in two main forms: carbon dioxide and methane.Main article: Terrestrial biological carbon cycle. The terrestrial biosphere includes the organic carbon in all la…
https://en.wikipedia.org/wiki/Carbon_cycle
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web search NEUTRAL — Deep-rooted grasses, such as switchgrass, store significantly more carbon in their root biomass than shallow-rooted annual crops, with an increase of 0.58 metric tons of carbon per hectare. This enhan…
https://phys.org/news/2026-04-deep-rooted-grass-significantl…
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web search NEUTRAL — Eric Slessarev. University of California, Santa Barbara | UCSB · Department of Ecology, Evolution, and Marine Biology.Many cross-site studies have found that SOC-poor soils tend to gain or retain carb…
https://www.researchgate.net/profile/Eric-Slessarev
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“The study helps confirm longstanding assumptions about the potential climate benefits of planting deep-rooted grass as a meaningful way to store organic carbon, replenish nutrients, and prevent erosion in soil.”
CORROBORATED
The claim that planting deep-rooted grass has potential climate benefits, including storing organic carbon, replenishing nutrients, and preventing soil erosion, is directly supported by the web search results. One result explicitly states the study helps confirm these assumptions, and another source discusses the benefits of deep root systems tapping into moisture and nutrients.
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web search NEUTRAL — This includes both soil organic matter and inorganic carbon as carbonate minerals. Soil carbon contributes to vital functions of soil in ecosystems.
https://en.wikipedia.org/wiki/Soil_carbon
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web search NEUTRAL — The study helps confirm longstanding assumptions about the potential climate benefits of planting deep-rooted grass as a meaningful way to store organic carbon, replenish nutrients, and prevent erosio…
https://phys.org/news/2026-04-deep-rooted-grass-significantl…
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web search NEUTRAL — Many grassland plants have deep root systems, some extending up to 10 feet below ground, and that allows them to tap into extra moisture and nutrients. Switchgrass (Panicum virgatum), an ornamental gr…
https://pulitzercenter.org/stories/how-planting-grasslands-f…
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“It also explores the implications of using perennial grasses as an alternative biofuel source that doesn't deplete soil as much as crops such as corn do.”
CORROBORATED
Web search results indicate that perennial grasses are explored as alternative biofuel sources that require fewer resources than corn. One source notes switchgrass is a promising biofuel crop, and another discusses perennial grasses being selected for advanced biofuels.
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web search NEUTRAL — The tall, hearty switchgrass plant is a promising biofuel crop that could someday produce greater ethanol yields than corn. In addition, switchgrass is considered a weed and can grow in poor soil cond…
https://news.clemson.edu/clemson-researcher-developing-peren…
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web search NEUTRAL — Miscanthus is a perennial rhizomatous grass with C4 photosynthesis and native to East Asia. This grass has been considered as a weed in East Asia, and never been considered as a bioenergy crop until t…
https://www.researchgate.net/publication/227079966_Perennial…
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web search NEUTRAL — Perennial grasses are being used as a solid fuel in co-fired coal power plants and are also selected as the raw material for advanced biofuels such as cellulosic ethanol.
https://www.academia.edu/87519371/Bioenergy_from_Perennial_G…
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“Slessarev is co-corresponding author of the study with Erin Nuccio, a researcher at Lawrence Livermore National Laboratory in California.”
CORROBORATED
Multiple web search results confirm that Slessarev is a co-corresponding author on the study with Erin Nuccio, who is identified as a researcher at Lawrence Livermore National Laboratory in California.
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wikipedia NEUTRAL — Jennifer Pett-Ridge is an American biologist who is a senior staff scientist at the Lawrence Livermore National Laboratory. She also serves as an adjunct professor at the University of California, Mer…
https://en.wikipedia.org/wiki/Jennifer_Pett-Ridge
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web search NEUTRAL — Slessarev is co-corresponding author of the study with Erin Nuccio, a researcher at Lawrence Livermore National Laboratory in California. A field at the James E. "Bud" Smith Plant Materials Center in …
https://news.yale.edu/2026/04/21/deep-rooted-grass-stores-si…
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web search NEUTRAL — Slessarev is co-corresponding author of the study with Erin Nuccio, a researcher at Lawrence Livermore National Laboratory in California.
https://phys.org/news/2026-04-deep-rooted-grass-significantl…
+ 1 more evidence source
info
“For the study, the researchers analyzed soil at a dozen sites in nine U.S. states, comparing samples from beneath deep-rooted switchgrass—a common prairie grass with a root depth of 5 to 10 feet—with samples beneath shallow-rooted crops.”
SINGLE SOURCE
The web search results provided for this claim are irrelevant to the specific details (dozen sites, nine U.S. states, 5 to 10 feet depth) mentioned in the claim. While the web search results confirm general research on soil and grasses, they do not corroborate the specific parameters (dozen sites, nine states, 5-10 ft depth) mentioned in the claim. The Wikipedia results are also general and do not confirm these specific study parameters.
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wikipedia NEUTRAL — Research is creative and systematic work undertaken to increase the stock of knowledge. It involves the collection, organization, and analysis of evidence to increase understanding of a topic, charact…
https://en.wikipedia.org/wiki/Research
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wikipedia NEUTRAL — The U.S. Army Combat Capabilities Development Command Army Research Laboratory (DEVCOM ARL) is the sole foundational research laboratory for the United States Army. It is a component unit of the U.S. …
https://en.wikipedia.org/wiki/United_States_Army_Research_La…
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wikipedia NEUTRAL — The United States Naval Research Laboratory (NRL) is the corporate research laboratory for the United States Navy and the United States Marine Corps. Located in Washington, DC, it was founded in 1923 …
https://en.wikipedia.org/wiki/United_States_Naval_Research_L…
+ 3 more evidence sources
info
“The study included sites in Oklahoma, Texas, Mississippi, North Carolina, New York, Michigan, Illinois, Wisconsin, and South Dakota.”
SINGLE SOURCE
The web search and Wikipedia results provided for this claim are entirely unrelated to the specific list of nine U.S. states mentioned. Therefore, corroboration for this specific list cannot be established from the evidence provided.
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wikipedia NEUTRAL — Preceded by more than a week of heavy rain, a slow-moving storm system dropped tremendous precipitation across much of Texas and Oklahoma during the nights of May 24–26, 2015, triggering record-breaki…
https://en.wikipedia.org/wiki/2015_Texas–Oklahoma_flood_and_…
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wikipedia NEUTRAL — Oakland is a city in California, United States. Oakland may also refer to:
https://en.wikipedia.org/wiki/Oakland_(disambiguation)
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wikipedia NEUTRAL — The Red River is a major river in the Southern United States. It was named for its reddish water color from passing through red-bed country in its watershed. It is known as the Red River of the South …
https://en.wikipedia.org/wiki/Red_River_of_the_South
+ 3 more evidence sources
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“The switchgrass stored an additional 0.58 metric tons of carbon per hectare in its roots compared to shallow-rooted annual crops, the researchers found.”
CORROBORATED
The claim that switchgrass stored an additional 0.58 metric tons of carbon per hectare in its roots compared to shallow-rooted annual crops is explicitly stated in multiple web search results, confirming the quantitative finding.
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wikipedia NEUTRAL — Caitlin Carmichael (born 2004) is an American actress. Her credits include In the Motherhood (2008), Criminal Minds (2009), Shake It Up, iCarly, Hot in Cleveland, Law & Order: LA, and Bag of Bones (al…
https://en.wikipedia.org/wiki/Caitlin_Carmichael
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wikipedia NEUTRAL — Midnight in the Switchgrass is a 2021 American crime thriller film directed by Randall Emmett in his directorial debut from a screenplay by Alan Horsnail. It stars Megan Fox, Bruce Willis, Emile Hirsc…
https://en.wikipedia.org/wiki/Midnight_in_the_Switchgrass
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wikipedia NEUTRAL — Panicum virgatum, commonly known as switchgrass and panic grass, is a perennial warm season bunchgrass native to North America, where it occurs naturally from 55°N latitude in Canada southwards into t…
https://en.wikipedia.org/wiki/Panicum_virgatum
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info
“The team took more than 700 soil core samples and carefully isolated the roots in each sample by hand.”
SINGLE SOURCE
The web search results discuss general methods for soil core sampling and root extraction, but none of the provided snippets confirm the specific quantitative detail of 'more than 700 soil core samples' or the manual isolation process described in the claim. The evidence is suggestive of the methodology but lacks direct corroboration for the specific numbers.
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wikipedia NEUTRAL — The 700 Club is the flagship television program of the Christian Broadcasting Network, airing each weekday in syndication in the United States and available worldwide on CBN.com. The news magazine pro…
https://en.wikipedia.org/wiki/The_700_Club
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wikipedia NEUTRAL — 700 (DCC) was a leap year starting on Thursday of the Julian calendar, the 700th year of the Common Era (CE) and Anno Domini (AD) designations, the 700th year of the 1st millennium, the 100th and las…
https://en.wikipedia.org/wiki/700
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wikipedia NEUTRAL — The Apple Network Server (ANS) was a line of PowerPC-based server computers designed, manufactured and sold by Apple Computer, Inc. from February 1996 to April 1997. It was codenamed "Shiner" and orig…
https://en.wikipedia.org/wiki/Apple_Network_Server
+ 3 more evidence sources
help
“They used radiocarbon isotopes to determine how the roots were chemically influencing the existing soil.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results or Wikipedia entries to confirm that the researchers used radiocarbon isotopes to determine the chemical influence of roots on existing soil.
help
“Eric W. Slessarev et al, Assessing the Effect of a Deep‐Rooted Grass on Belowground Carbon Storage in Cultivated Land: Insights From a Multi‐Site US Study, Earth's Future (2026). DOI: 10.1029/2025ef007102”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results or Wikipedia entries to confirm the specific publication details, including the DOI (10.1029/2025ef007102) or the exact citation format for the study.
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.