Biochar as a Soil Amendment in Minnesota: Findings from Literature and Interviews
2023-05
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Biochar as a Soil Amendment in Minnesota: Findings from Literature and Interviews
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2023-05
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The Sustainable Farming Association of Minnesota (SFA) Central Chapter initiated an effort to research biochar production as an alternative to burning wood waste, and to understand the potential benefits of utilizing biochar as a soil amendment to improve soil function and sequester carbon. With support from the University of Minnesota Extension Sustainable Development Partnerships, a graduate student was hired to review the research literature on biochar and interview subject matter experts. In partnership with representatives from the Minnesota Composting Council, Pope/Douglas Solid Waste Management, United States Department of Agriculture, the University of Minnesota Extension Sustainable Development Partnerships, and SFA Central Chapter, U of M graduate student Samantha Hunt produced this report.
Biochar, a stable carbon created via pyrolysis (heating without the presence of oxygen), can be produced from the massive amounts of woody debris generated by tree removal and trimming, brush removal, woodlands management, and storm damage. Biomass that is currently burned or left to decompose releases most of the carbon back into the atmosphere. Conversion of woody biomass into biochar could provide an alternative to burning and therefore reduce greenhouse gas emissions. Biochar is also a valuable soil amendment that can improve soil health and productivity. There is a high interest from local produce growers and regenerative farmers in Central Minnesota to utilize biochar as a soil amendment.
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This graduate research assistantship illuminated the ever-growing body of research and interest in biochar, significant research gaps, and timely opportunities for citizen science contributions. The spring semester 2023 study included a literature review as well as a series of interviews with researchers, farmers, agency representatives, and nonprofit partners. A brief overview of each interviewee’s position and relevant experience is provided on the following page.
Additionally, the project steadily expanded the partnerships and network of stakeholders coming together weekly to explore opportunities for collaboration. Moving forward, project partners plan to continue building on this study’s findings, offering educational information and presentations to promote and facilitate the use of biochar in agricultural production, exploring opportunities to develop a pilot framework for on-farm research and demonstration projects, and promoting citizen science opportunities for producers.
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Central Regional Sustainable Development Partnership, Sustainable Farming Association
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