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New Soil Health Institute Study Provides Insights Into the Role Soil Organic Carbon Can Play in Improving Soil Health and Reducing Drought

By: 3BL Media

SOURCE: The Soil Health Institute

DESCRIPTION:

April 28, 2022 /3BL Media/ - A new peer-reviewed research report published by the Soil Health Institute provides fresh insights into the vital role that soil organic carbon levels can play in preventing drought, reducing flooding and improving the health and water retention of the soils used to grow crops.

The publication includes the development of new pedotransfer function equations, available for use by other researchers, that enable more precise measurement of the correlation between carbon levels, water retention and various soil types. These new equations will allow scientists to better predict how much water farmers can provide to their crops through improved soil health – specifically, by raising their soil carbon.

According to SHI, the global non-profit charged with safeguarding and enhancing the vitality and productivity of soils, healthy soil that is rich in carbon acts like a sponge to soak up rainfall and store it for crops. While farmers have known this for a long time, it has been hard for scientists to predict how much extra water farmers can expect when they use regenerative agriculture practices that improve soil carbon. This is important because many farmers consider water management to be the biggest reason to adopt soil health management practices like no-till or cover crops.

“A positive, causal relationship between soil organic carbon and plant water-holding capacity has direct benefit by increasing crops’ resistance to drought,” said Dianna Bagnall, a soil research scientist with SHI and lead author of the study.

According to Bagnall, previous research on this relationship has been mixed, with some findings showing negligible impact on soils’ water-retention capacities from higher soil carbon levels while others showed a substantial increase in water holding. This new study took a different approach, drawing on a more comprehensive sample of soil from locations throughout North America, using more natural, preserved soil structures, and identifying levels of calcium carbonate, which can impact water-holding capabilities, in the soil samples as part of its analysis.

“Our findings showed an increase in water-holding capacities for non-calcareous soils (those lacking calcium carbonate) resulting from soil organic carbon that was more than double that of earlier studies,” Bagnall said. “This is an exciting development, since it provides a concrete incentive for farmers to adopt more responsible soil management practices that will positively impact their productivity and profitability.”

To help farmers evaluate the impact carbon sequestration and other practices might have on their businesses, SHI is developing a decision support tool. “The new SHI tool will allow farmers to review various management practices to achieve a targeted increase in available water-holding capacity and better drought resilience in their soils,” Bagnall said.

The complete SHI study, entitled “Carbon-Sensitive Pedotransfer Functions for Plant Available Water,” can be accessed at https://acsess.onlinelibrary.wiley.com/doi/abs/10.1002/saj2.20395. The new equations discussed in the study are freely available for use by other scientists.

“Our hope is that other scientists and conservationists will build on this work to develop new models for how soils can offset carbon emissions and make agriculture more drought resistant,” Bagnall said.

About the Soil Health Institute
The Soil Health Institute is a global non-profit with a mission of safeguarding and enhancing the vitality and productivity of soils through scientific research and advancement. The Institute brings together leaders in soil health science and the industry to conduct research and empower farmers and other landowners with the knowledge to successfully adopt regenerative soil health systems that contribute economic and environmental benefits to agriculture and society.

The Institute’s scientific team holds doctorates in various soil science and related disciplines, with specialties in carbon cycling, nutrient cycling, water cycling, nutrient management, farmer training, education, GIS, ecosystem service modeling, soil-plant relationships, on-farm economics, and others. Together, the team follows a comprehensive strategy for advancing adoption of regenerative soil health systems, as briefly described in this 5-minute video.

Healthy soils are the foundation for restoring our land. Together, we can create a secure future for all, mitigate the effects of climate change, and help farmers and organizations meet production and environmental goals at scale. Visit www.soilhealthinstitute.org to learn more, and follow us on YouTube, LinkedIn, Twitter and Facebook.

For media inquiries, contact Rivers Agency:

publicrelations@riversagency.com
919-932-9985

KEYWORDS: soil health institute, soil health

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