| 1994 | Russell S. Karow | Crop and Soil Science |
| 1995 | Phillip B. Hamm | Botany and Plant Pathology/HAREC |
| 1996 | Mark Mellbye | Linn County Extension |
| 1997 | Myron D. Shenk | Integrated Plant Protection Center |
| 1998 | Gale Gingrich | Marion County Extension |
| 1999 | Ronald Hathaway | Animal Sciences |
| 2000 | Melodie L. Putnam | Botany and Plant Pathology |
| 2001 | Ben Simko | Crop and Soil Science |
| 2002 | Paul Heimowitz | Fisheries and Wildlife |
| 2004 | Marvin Butler | Crop and Soil Science |
| 2005 | Bernadine Strik | Horticulture |
| 2007 | Samuel Chan | Fisheries and Wildlife |
