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U.S. Department of Energy Bioenergy Technologies Office
2017 Project Peer Review
The Prairie Farm: An Experiment in Bioenergy Production, Landscape Restoration, and
Ecological Sustainability
PI: W. Carter Johnson, South Dakota State Univ.CoPIs: Arvid Boe, Cody Zilverberg, Tom Schumacher, and
Vance Owens
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Our Project Goal…To develop a fresh, alternative approach to farming in the western corn belt by conducting farm-scale research to demonstrate how to make a sustained and earned living from restored natural grassland on converted cropland while protecting and enhancing the natural environment (multi-functional agriculture)
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Multi-Functional Agriculture“Farming produces not just food, fiber, and
energy but also a host of societal benefits, including cleaner water, sequestered carbon, landscape amenities such as wetlands and wildlife habitat, and rural community employment”
-G. A. Wilson. 2007. Multifunctional Agriculture. CABI Publ.
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Key Project Outcomes• Seven-year project generated
considerable hard data on the production, management, and marketing of biomass feedstock at the landscape scale to inform the nascent cellulosic biofuel industry.
• Abundant ecosystem services were recovered on low-input restored grassland creating a better balance between economics and environment than currently exists in high-input grain farming.
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EcoSun Prairie Farms, Inc.
Est. April, 2007
South Dakota Non-Profit Corporation
IRS designated as 501 (c)(3) public charity
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EcoSun Prairie Farms, Inc.
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Prairie Farm Guiding Principles • Restoration of drained wetlands to re-
establish sub-irrigated conditions for high grass biomass and seed production
• Low input approach (less iron, fuel, biocides, etc.)
• Improved water retention and quality• Greater atmospheric health through
carbon sequestration• Improved soil quality
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Guiding Principles (ctd.)
• Use perennial, not annual, plants that are locally adapted and native
• Develop multiple income streams
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Income StreamsPresent• Native grass hay/biofuel feedstock• Native plant seed (upland and wetland)• Specialty meats (e.g., grass-fed beef)• Competitive research fundingFuture• Carbon credits• Cellulosic biofuels• Recreation (ecotourism, fee hunting)
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Collaborating Organizations• The Nature Conservancy ($100,000 in kind for seed)• U. S. Fish and Wildlife Service ($150,000 cost-share
for seed, fencing, wetland plugs)• University of Minnesota (subcontract for biofuel
feedstock research $30,000)• Millborn Seed Co. (cost-share seed $15,000)• Agricultural Research Service (staff support for
economics analysis)• POET (forage quality analysis for ethanol production)• South Dakota State University (use of farm equipment
and greenhouse space)
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Re-establishing upland prairie across farmed landscapes
Subproject 1
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Grass drilling in soybean stubble
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Aerial spreading of seeds on snow
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Seed harvest in virgin prairie
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2007
2009
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Mixed diversity planting
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High diversity planting
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Switchgrass seed
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Big bluestem native hay
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Prescribed fire
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Findings from subproject 1• Productive, native grassland valuable as
seed, hay, and biofuel feedstock can be quickly and successfully established on retired cropland.
• Three-year average biomass yields ranged from 9.7-13.2 Mg/ha for the different mixtures planted.
• A strategic placement of monocultures and mixtures of species across the farm landscape offers a livable income and desired ecosystem services.
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Re-vegetating wetlands across the landscape
Subproject 2
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Construction of ditch plug
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Berm reconstruction
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After reconstruction
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Planting cordgrass plugs
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Planted Cordgrass
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First-year cordgrass
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2008
2009
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Mature prairie cordgrass
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Cordgrass plugging with tree planter
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Prescribed burn in wetland
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Haying in dry wetland
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Findings from subproject 2• Wet soils limit planting options in wetlands;
plugging was labor intensive but highly successful.
• Prairie cordgrass, a wetland obligate plant, yielded the highest biomass of all plantings.
• Restoring wetlands with native, economically valuable plants such as cordgrass produced the highest per acre farm income from seed and hay sales.
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Grass-Fed Beef
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Mortenson Ranch Heifers
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Marketing grass-fed beef
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Increasing biodiversity in switchgrass plantings
Subproject 3
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Pairing experiments---------------Switchgrassand Canada
Milkvetch (upper photo)
Big bluestem and shorter pairings (lower photo)
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Findings from subproject 3:Increasing switchgrass biodiversity
• Reliance on switchgrass monocultures for biofuel feedstock may miss opportunities for higher biomass and more ecosystem services.
• Certain native species, such as little bluestem, prairie cordgrass, and cup plant out-produce switchgrass on more extreme sites in heterogeneous fields.
• Tailoring mixtures of plants including forbs (flowers) to soils where they are best adapted for growth increases whole field biomass and numbers of insect pollinators, butterflies, and wildlife.
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“Grassonomics”
Payoff for landscape restoration
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Grassland Products Sold in 2014
• Hay (summer and fall cut) ~ 400 tons• Prairie-raised beef (retail and
wholesale ~ 5,000 pounds• Native plant seed (switchgrass,
cordgrass, sedge, wedgegrass) ~ 8,000 pounds
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Summary• Seven-year project generated
considerable hard data on the production, management, and marketing of biomass feedstock at the landscape scale to inform the nascent cellulosic biofuel industry.
• Abundant ecosystem services were recovered on low-input restored grassland creating a better balance between economics and environment than currently exists in high-input grain farming.
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“I Am The Grass………Let Me Work”
Carl Sandburg “Grass” 1918
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Outreach, publications & funding
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Prairie Restoration Philosophy
“Our goal must change from preservingnature as separate from humans to the morenecessary task of remaking ourselves sothat we might function as a part of nature.Some humans are at work at thisfundamental challenge just now…”
R. Manning. “Grassland”
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Prairie Restoration Philosophy
“There is, after all, the possibility of a richerfuture. That is the promise of grass …. Thegrass can live again. Unlike forest, itrecovers rapidly, some of it in a matter of fiveor ten years. There is a possibility ofresurrection in a real and physical sense.”
R. Manning. “Grassland”
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“The most insane example of till farming occurred (and is still occurring) in our own Great Plains, where vast acreages of prairie grasses were plowed up and turned into a dust bowl. Had that land been left in grass, and had forage crops been improved to carry more animals per acre, this whole area would be thriving today instead of surviving as a huge no-man’s land of subsidized corn and soybeans dotted with decaying towns and farmsteads.”Gene Logsdon All Flesh is Grass
Problem Statement