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- Agriculture 112
- Grasses--Research 95
- Universities and colleges--Faculty 49
- Tall fescue 21
- Meetings 14
- Portraits 14
- Self-pollination 14
- Portraits, Group 13
- Graminaceae 11
- Agricultural machinery 10
- Harvesting 6
- Ryegrasses 6
- Foote, Wilson H. 4
- Oregon State University. Agricultural Experiment Station 4
- Agronomic Crop Science 3
- Cattle 3
- Cowan, J. Ritchie (John Ritchie) 3
- Cherry 2
- Cooney, Wilbur T. 2
- Deans (Education) 2