- Edward C. Peck, Arthur Koehler, Charles Walter Collins, David Edmund Stephens, Ernest Bateman, George William Trayer, Hazel Katherine Stiebeling, Herbert Dwight Smith, James Edward McMurtrey, John Guice Sutton, John William Roberts, Joseph Clarence Silver, Joshua John Skinner, Mark Hughlin Haller, Milton Henry Fohrman, R. D. Garver, R. W. Leukel, Ralph Lester Miller, Raymond Secord Washburn, T. D. Jarrell, Thompson Elwyn Woodward, Walter M. Osborn, William Henry Fry, William Jasper Spillman, William John Nolan, Willis James Nolan, Carrington Bonsor Williams, Hazel Edith Munsell, Henry Morris Wanser, Ione P. Bassett, James Geere Dickson, James McKenzie Hankins, John Brown Cuno, John Clymer Dunegan, John Holmes Martin, John Robert Magness, R. R. Graves, Samuel Frederick Potts, Aaron Francis Bracken, Aaron Guy Johnson, Fletcher Pearre Veitch, Harvey Blount Mann, William Walter Yothers
· 1932
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Alonzo Bettis Cox, Carl Robert Swinson, Clifford E. Hood, Curtis Paul Clausen, E. W. Sheets, Ernest Adna Back, George Casper Haas, Henry F. Bain, Herman Meserve Johnson, Howard Archibald Turner, John Brown Cuno, John Robert Magness, Kelsey B. Gardner, L. P. Rockwood, Morgan William Evans, Raymond Secord Washburn, Robert Julius Formad, Robert Lee Nixon, Thomas K. Killand, William Clare Davis, William Willard Ashe, United States. Department of Agriculture, Edward John Hanzlik, Helmut Charles Diehl, Henry Desborough Scudder, Joseph Lyonel King, Lawrence Alfred Adams, Mordecai Ezekiel, R. T. Cotton, Ross Homan Tuckwiller, Warren Clemmer Funk, Cho Teranishi, Mark Hughlin Haller, William Henry Gibbons· 1926
Of results. pp. 34.
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Benjamin Schwartz, Charlotte Chatfield, Chester Otis Reed, E. R. Van Leeuwen, E. W. Sheets, Eloise Blaine Cram, George McMonies Hunt, Glen Blaine Ramsey, James William Park, John Brown Cuno, John Harold Lister, Joseph Lyonel King, Karl S. Quisenberry, Liberty Hyde Bailey, Lorin Harvey Bailey, Marinus Westveld, Neil E. Stevens, Perry Eugene Howard, Robert Montgomery Gehl, Roland McKee, Sherlock Melvin Dietz, Theodore Bergen Manny, Vera Katherine Charles, Wilbur Magruder Hurst, William Orrin Robinson, Charles Ranger Enlow, Cortes Gilbert Randell, Georgian Adams, Jacob Allen Clark, James Keever Holloway, Lysle Douglas Leach, Marion Imes, Robert Henry Black, William Ensley Jackson, Willard Hull Wright· 1930