by 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

by 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