by Benjamin Koehler, David Cleveland Wimer, Frank Lincoln Stevens, Harold Clayton M. Case, Harold Hall McKinney, James Lloyd Edmonds, Mary Helen Keith, Oliver Ralph Overman, Raymond Stratton Smith, William Garfield Kammlade, Arthur Knapp Mackey, Chalmers Woodruff Crawford, Frank Paul Sanmann, George Harlan Dungan, James Ransom Holbert, Kenneth Hayes Myers, Marion Boyer Harland, Orda Allen Plunkett, Frederick Alexander Davidson, Robert William Webb

1925

by Albert Lemuel Whiting, Charles Spencer Crandall, Emil Rauchenstein, Frederick Charles Bauer, George Harlan Dungan, Harold Hanson Mitchell, John Benjamin Rice, John William Lloyd, Oliver Ralph Overman, Robert Watt Stark, Frank Paul Sanmann, Gage Griffin Carman, Robert Cooke Ross, Russell James Laible, Thomas Everett Richmond, Tom Sherman Hamilton, Leslie Ellsworth Card, William Garfield Kammlade

1926

by Charles Bovett Sayre, Clyde Melvin Woodworth, Emil Wilhelm Lehmann, Frederick Charles Bauer, George Harlan Dungan, Harold Clayton M. Case, Harry Warren Anderson, John Jacob Pieper, John William Lloyd, Paul Hubert Tracy, Robert Childers Ashby, Robert Graham, Roger Hammond Bray, Roscoe Raymond Snapp, Sleeter Bull, Victor Wendell Kelley, William Garfield Kammlade, Everett A. Tunnicliff, Frank C. Kingsley, Harrison August Ruehe, Horace Mead Newell, John Harvey Knox, John Harwood Longwell, Lucian Hart Strubinger, R. H. Wilcox, Wesley Pillsbury Flint, William Leonidas Burlison, Frank Paul Sanmann, Herbert Andrew Berg, Ivan Bertrand Boughton

1929

by Bethel Stewart Pickett, Bonnie Elizabeth Scholes, George Matthew Reed, Harry Alexis Harding, Harry Warren Anderson, J. R. Holbert, John William Lloyd, Juliet Lita Bane, Mabel Wilkerson, Nelson William Hepburn, Oliver Ralph Overman, Robert Graham, University of Illinois (Urbana-Champaign campus). Dept. of Agronomy, Wesley Pillsbury Flint, William Leonidas Burlison, William Sanford Brock, George Harlan Dungan, Harriet Muriel Phillips, Harrison August Ruehe, Ivan Bertrand Boughton, Robert Watt Stark

1919