- E. G. Davis, H. O. Hill, Charles William Mann, Earl W. McComas, Francis Howlett Eyre, Glenn Maurice Horner, Harry Ardell Allard, Henry Albert Jones, Henry Howe Richardson, James William Kimmey, John A. Scholten, K. D. Arbuthnot, Leonard Lee Harter, Marian William Hazen, Marshall Weddell Stone, Merritt P. Sarles, Oliver I. Snapp, Paul V. Siggers, Perley Spaulding, Ralph Brownlee Swain, Russell Roy Reynolds, Thomas Leigh Copley, Van E. Romney, William Henry Black, William John Zaumeyer, A. F. Howland, A. G. McCall, Burt P. Kirkland, E. A. Gorman, Glen Norton Davis, H. Rex Thomas, James Edwin Comfort, James Randolph Thomson, James Russell Douglas, John Raymond Hansbrough, Robert Livingston Furniss, Russell K. LeBarron, F. G. Bell, W. E. Bond, Byron Lester Southwell, William Virgil Hukill
· 1945
- Frank Leslie Duley, Alfred Douglas Edgar, Arthur Frederick Sievers, Claude Kedzie Shedd, Frank W. Tilley, George McMillan Darrow, Harold Everett Tower, Harry L. Garver, Irvin Fay Reed, Leon Sherwood Minckler, Morris Samson Lowman, Myron Francis Babb, O. L. Mimms, Philip Luginbill, Rush Porter Marshall, Tom Dale, Verne Elbert Davison, Walter Whittier Swett, William Phelps Everard, William White, Alma May Waterman, Arthur Glenn Chapman, Elmer Clark Stevenson, George Fordyce Waldo, Harry Harrison Gardner, James Ellsworth Kraus, Jouette Clark Russel, Miriam Birdseye, William John Zaumeyer
· 1951
- Albert Ronald Merz, Auton William Skuderna, B. L. Wade, Bess Viemont Morrison, Chalmers Jackson King, Charles Frederick Clark, Charles W. Culpepper, Clark Frederick Clark, David A. Savage, Elmer Valentine Walter, Ernest Muchmore Mervine, Fred Corry Bishopp, George Washington Craddock, Helen Nebeker Hann, Joseph Stuart Caldwell, Joshua John Skinner, Leo Anthony Isaac, Loyd William Brannon, Oscar Roland Mathews, Paul A. Berry, Rufus King Helphenstine, Samuel Newton Dicken, United States. Department of Agriculture, Victor Rickman Boswell, Wilbur Clifford Edmundson, William Daniel Smith, Hazel Katherine Stiebeling, Arthur Otto Alben, Carroll Newton Smith, Frederick James Stevenson, Hubert Hill Moon, James Herbert Beattie, Lee Seaton, Lindsey Andrew Brown, Margaret Blanche Hays, Ralph Edwin Beckett, Stanley Ward McBirney, Adonis A. Mathewson, Earl Donald Fowler, John McDowell McCown, Orlan Parker
· 1939
- Arthur Charles Dillman, Brittain Bragunier Robinson, Charles Abel Bennett, Charles Franklin Kinman, David Carleton Neal, Frank Getz Ashbrook, Frederick David Richey, Harry Lawrence Wilson, Harry Vaughn Harlan, Harvey Leroy Westover, James Franklin Collins, Joseph Patrick Quinn, Leonard Lee Harter, R. C. Gaines, Roland McKee, Wallace Ashby, Walter William Wilcox, Wilbur Reed Mattoon, William Renwick Beattie, William Sylva Gochenour, David Adelbert Isler, Francis Leo Gerdes, Harry August Schoth, John Robert Magness, Theodore Ellinson Stoa, Walter Howard Nash, William John Zaumeyer, William Williams Gilbert, B. L. Wade
· 1936