U.S. Testing Network

The US Testing Network (USTN)  is a member-based organization founded in 2009. USTN’s purpose is to coordinate a rigorous testing program to evaluate public and private corn germplasm.  The primary focus of USTN is to evaluate germplasm under development for the organic and non-transgenic grain industry. To reach that purpose, USTN’s members provide corn to be tested, locations for testing and/or financial support.

Membership includes:

  • Public Breeders
  • Private /Independent Breeders
  • Seed Retailers
  • Researchers

Entry spot reservation typically is due to USTN by March 1.  For more information about testing, please contact Chris Wilbeck, USTN Testing Coordinator, 515-229-6988 or chris.ustn@practicalfarmers.org

An estimated 80 percent of the corn grown in the U.S. today is genetically modified, and most seed companies continue to phase out non-GMO corn seed varieties. Practical Farmers of Iowa launched the U.S. Testing Network in 2009 to rebuild the dwindling selection of non-GMO corn seed and continues to act as the fiscal agent today.


USTN Members Selling Non-GMO or Organic Corn Hybrids:

Albert Lea Seed House

Mac Ehrhardt
1414 W Main St
Albert Lea MN 56007

Beck’s Hybrids Great Harvest Organics

John Hunt
6767 E 276th St.
Atlanta, IN  46031

Blue River Hybrids

Maury Johnson
27087 Timber Rd.
Kelley, IA 50134

Brownseed Genetics

Charles Brown
N 1279 530 St PO Box 7
Bay City WI 54723

eMerge Genetics

Wayne Hoener
4401 Westown Parkway,
Suite 225
West Des Moines lA 50266

Foundation Organic Seed

Steve Mohr
634 13th Avenue North
Onalaska, WI

Genetic Enterprises International

Alix V. Paez
6165 Crabapple Lane
Johnston lA 50131

JGW Hybrids

JGW Hybrids
Fred Wilz
2907 Ontario St
Ames IA

Lord’s Seed

John Larimar
6825N 375E
Howe IN 46746

Mandaamin Institue

Walter Goldstein
W2331 Kniep Road
Elkhorn WI  53121

Masters Choice

Cullen Johnson
305 W. Vienna Street
Anna, IL  62906

Wyffels Hybrids

Brian Humphries
13344 US Hwy 6
Geneseo, IL  61254

USTN Participants:


Adaptive Symbiotic Technologies

Albert Lea Seed

Beck’s Hybrids

Blue River Hybrids

Brownseed Genetics

Camerar Farms

Cornell University

CRD Advisors

CROPP Cooperative

DKD Genetics

eMerge Genetics

Foundation Organic Seed

Frank Kutka

Genetic Enterprises International

Gray Research Production

Great Harvest Organics

Iowa State University

JGW Hybrids

Koopman Genetics

Lords Seed

Maisadour Semences

Mandaamin Institute

Mark Seed

Masters Choice

Michael Fields AG Institute

Montgomery Cons.

New Mexico State University

North Dakota State University

Ohio State University

Penn State University

Purdue University

Real Farm Research

Rodale Institute

Soutwest Seed Research

Spectrum Seed Technologies Research

Texas A&M Agrilife Research

University of Missouri

University of Nebraska – Lincoln

University of Vermont

University of Wisconsin – Madison


Wyffels Hybrids

Practical Farmers of Iowa – Test Coordinator