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- Croplands 45
- Universities and colleges--Faculty 45
- Crop and Soil Science 27
- Boersma, L. 23
- Soybean 11
- Central Oregon Agricultural Research Center 7
- Johnson, M. J. (Malcolm Julius) 7
- Kronstad, Warren E. (Warren Ervind), 1932- 4
- Sudan grass 4
- Wheat 4
- Lima bean 3
- Oregon State University. Extension Service 3
- Burrill, L. C. 2
- Corn 2
- Crop Science 2
- Sorghum 2
- Tomatoes 2
- Turfgrasses 2
- Universities and colleges--Alumni and alumnae 2
- Barley 1