by Birely J. Landis, Charles D. Owens, Harry L. Garver, Jean H. Dawson, Jon M. Skovlin, Kenneth Hayes Myers, Llewelyn Williams, Norman Carroll Teter, Richard Lee Hiner, United States. Agricultural Research Service. Agricultural Engineering Research Division, United States. Department of Agriculture, Walter E. Peay, Warren Whitcomb, William J. Ash, William W. Neely, Benjamin F. Detroy, Jerome A. Onsager, John Wesley Rockey, Verne Elbert Davison, William O. Lee, Francis Leonard Timmons, Lawrence V. Compton

1964

by Allan K. Stoner, Anselm Clyde Griffin, Benjamin F. Detroy, Charles D. Owens, Donald F. Wanjura, Floyd E. Moeller, Franklin W. Martin, Gino J. Mangialardi, J. R. Raulston, James Roland Coppedge, Joseph B. Cocke, K. H. Read, Roy Verble Baker, Thayer Cleaver, Walter R. Houston, Dirk Hendrik Van der Sluijs, P. D. Lingren, R. L. Ridgway

1974