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- Exhibitions 127
- Oregon State University. Agricultural Experiment Station 31
- Straw--Utilization 19
- Universities and colleges--Faculty 10
- Fur 6
- Agricultural experiment stations 5
- Grass seed industry 5
- Fur farming 4
- Oregon State University 4
- Oregon State University. Cooperative Extension Service 4
- Boersma, L. 3
- Crop and Soil Science 3
- Hot water 3
- Agricultural Economics 2
- Building materials 2
- College students 2
- Crop Science 2
- Feeds 2
- Floyd, Richard 2
- Future Farmers of America 2