- Albert Ronald Merz, Burt Walter Heywang, Charles W. Culpepper, Clarence Elbert Clement, Colin Alexander Taylor, Edward Dougall Gordon, Edwin Richard Kalmbach, Floyd Franklin Smith, Glenn Kenton Rule, H. F. Willard, Harold Hall McKinney, Hubert Lawrence Person, Irving Wesley Dix, Ivan Claude Jagger, James Vernon Morrow, John Clifford Elmore, John Robbins Mohler, Lee Milo Hutchins, Marinus Westveld, Matthew James Culley, May Thacher Cooke, Randall Latta, Robert Claude Wright, Samuel Benton Nuckols, United States. Department of Agriculture, Arthur Charles Mason, Charles Cloyes Fletcher, Dudley Smith, Eddie Walter Bodine, Gilbert Weaver Scott, Hubert Hill Moon, Joe Roudolph Furr, John Robert Magness, Leonard Gordon Utter, Maurice Sommer Shahan, Wilbur Magruder Hurst, Halbert Houston Thornberry
· 1937