- Albert Watts Moore, Birely J. Landis, Charles Chase Hill, Charles Stewart Bisson, Edmund Ellsworth Vial, Edwin Richard Kalmbach, Frederick Lovejoy Wellman, Frederick Strauss, Harry Vaughn Harlan, Homer Charles McNamara, Homer LeRoy Shantz, Kenneth Thurman Williams, Lela Evangeline Booher, Loren LeRoy Davis, Paul Random Henson, Ralph Hoagland, Raymond Leslie Spangler, Rutillus Harrison Allen, Theodore Comstock Scheffer, Theodore Thomas Ayers, William John Reid, Camille Leon Lefebvre, Dalton Ray Hooton, Erling Hole, Eva Ruth Hartzler, George Gordon Snider, George Haymaker Vansell, Harvey Leroy Westover, Hubert William Lakin, Jenkin William Jones, John Stuart Pinckney, Louis Hyman Bean, Mary L. Martini, Neale F. Howard, R. L. Piemeisel, Ralph Melvin Lindgren, Robert Claude Wright, Dow Dewey Porter, Harland Stevens, Horace Greeley Byers, Howard Wilfred Johnson, Ronald Lester Mighell, Walter Brown Dye, Walter M. Peacock
· 1941
- A. B. Clawson, Arthur Frederick Sievers, C. H. Batchelder, C. J. King, Chase Going Woodhouse, Frederick Charles Scobey, Glenn Sanborn Smith, Hugh Hackland Darby, Irvin Carl Feustel, Irvin Cecil Brown, James Robert Douglass, John Guice Sutton, John William Strowbridge, Leander Scales Stuart, M. A. Crosby, M. S. Anderson, Milo Nelson Wood, Norma Lenys Pearson, Orville Alva Faris, Robert Claude Wright, Samuel Fortier, William Henry Black, Arthur Appleton Young, David Dewitt Questel, Edwin Alfonso Trowbridge, Eleanor Muriel Kapp, Faith Moors Williams, Horace Greeley Byers, Jacob Allen Clark, Morris Samson Lowman, Ralph Wylie Frey, Thomas Donnelly Rice, Walter M. Peacock, Lawrence Henry James, Thomas Moore Whiteman
· 1933
- N. R. Ellis, Charles William Rees, Edwin Richard Kalmbach, Enoch Wesley Nelson, Fenner Satterthwaite Stickney, Foster Hendrickson Benjamin, George Bishop Sudworth, Harvey Leroy Westover, James William Park, Joseph Stuart Caldwell, Leander D. Howell, Lloyd Ancil Spindler, M. A. Yothers, Raymond Frank Taylor, Robert Claude Wright, Robert Ellsworth Getty, Robert Pilson Albert Johnson, Thomas Ray Stanton, Tyler Frazier Akers, United States. Bureau of Agricultural Economics, Walter Huber Meyer, Wightman Wells Garner, William Henry Black, William Stuart, Edwin Harrison Milstead, Franklin Arthur Coffman, Harry August Schoth, Jay Laurence Lush, John Henry Zeller, Marsden Robert Brundage, Walter M. Peacock, Arthur Truman Semple, V. F. Tapke
· 1935
- Alfred Paul Dachnowski-Stokes, Arnold Orlando Benson, Bruce Berger Derrick, Curtis May, Curtis Paul Clausen, Erastus Newton Bates, Erval Jackson Newcomer, George Arceneaux, George McMillan Darrow, George Whitfield Stiles, Glen Blaine Ramsey, Hastings Newcomb Bartley, Homer Charles McNamara, James Robert Dawson, John Clay Overpeck, Joseph Martin Mehl, Morris Cotgrave Betts, Neil E. Stevens, Oliver I. Snapp, Perez Simmons, Roland McKee, Samuel Benton Nuckols, Victor Bigelow Bonney, Walter M. Peacock, William Albert Hartman, United States. Department of Agriculture, Manly Alexander Raymond Kelley, Byron Curtis Brunstetter, Dalton Ray Hooton, G. F. Gravatt, George Fordyce Waldo, George P. Bodnar, Harry August Schoth, Harry Avalon Elcock, James Randolph Thomson, John Donald Black, L. B. Scott, M. A. Yothers, Paul A. Clifford, Richard Thomas Gibbens, William Doyle Reed, Dow Dewey Porter, E. A. McGregor, Edward James Stirniman, Henry Albert Lepper, James Louis Stephens
· 1931
No image available
No image available
No image available
Charles William Rees, Edwin Richard Kalmbach, Enoch Wesley Nelson, Fenner Satterthwaite Stickney, Foster Hendrickson Benjamin, George Bishop Sudworth, Harvey Leroy Westover, James William Park, Joseph Stuart Caldwell, Leander D. Howell, Lloyd Ancil Spindler, M. A. Yothers, Ned Royce Ellis, Raymond Frank Taylor, Robert Claude Wright, Robert Ellsworth Getty, Robert Pilson Albert Johnson, Thomas Ray Stanton, Tyler Frazier Akers, Walter Huber Meyer, William Henry Black, William Stuart, Edwin Harrison Milstead, Franklin Arthur Coffman, Harry August Schoth, Jay Laurence Lush, John Henry Zeller, Marsden Robert Brundage, Walter M. Peacock, Arthur Truman Semple, V. F. Tapke· 1934
No image available
No author available
· 1929