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- Agriculture 14
- Oregon State University. Extension Service 12
- Rivers--Oregon 5
- Wildfires 5
- Erosion 4
- Agricultural laborers 3
- Channels 3
- Fire extinction--Equipment and supplies 3
- Forests and forestry 3
- Graminaceae 3
- Livestock 3
- Sheep 3
- Universities and colleges--Faculty 3
- 4-H clubs 2
- Beets 2
- Fire extinction 2
- Fire fighters 2
- Fire prevention 2
- Forest fires--Prevention and control 2
- Fuelbreaks 2