- 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
- Arnold Kent Balls, Earl W. McComas, Erastus Newton Bates, Hamilton Paul Traub, Jacob Allen Clark, Mark Hughlin Haller, Ralph Corbin Hall, Walter Jay Hall, William Alvin Douglas, William Doyle Reed, Harold Edwin Stevens, James Edwin Comfort, Jesse Wilburn Ingram, John Paul Vinzant, Karl Spangler Quisenberry, Marian William Hazen, T. Ralph Robinson
· 1941
- Lela Evangeline Booher, Robert Van Rensselaer Reynolds, Arlo McGrillis Vance, Arnold Kent Balls, B. L. Wade, Clarence Francis Kelly, Earl W. McComas, Erastus Newton Bates, Frank Shirley Chamberlin, George Haymaker Vansell, Hamilton Paul Traub, Hazel Katherine Stiebeling, Herbert Halden Walkden, James William Park, John Paul Miller, Ralph Corbin Hall, Robert Hibbs Peebles, Roger Ulysses Swingle, Russell Rutherford Whitten, W. A. Douglas, Walter Jay Hall, William Doyle Reed, William Henry Black, United States. Department of Agriculture, Albert Halsey Pierson, Archie Hugh Madden, Burwell Britt Powell, Eva R. Hartzler, Jesse Wilburn Ingram, John Paul Vinzant, Malcolm Ernest Smith, Marian William Hazen, Sadye Frances Adelson, T. Ralph Robinson, Verner Ivan Clark, Elizabeth Margaretta Hewston, Ennis C. Blake, Harold Edwin Stevens, James Edwin Comfort
· 1942