USDA – NRCS
September 2018
Source link here.

Gary Lesoing – University of Nebraska Extension
March 2018
Stephanie Bruggeman – South Dakota State University
March 2018

Dean Baas – Michigan State University Extension
March 2018
Marisol Berti – North Dakota State University
March 2018
Charles Ellis – University of Missouri Extension
March 2018
Nathan Johanning – University of Illinois Extension
March 2018