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- Agriculture 243
- Rivers--Oregon 160
- Forests and forestry 92
- Lumber trade 51
- Oregon State University. Extension Service 51
- Agricultural laborers 47
- Harvesting 45
- Mountains--Oregon 36
- Forest fires--Prevention and control 35
- Coasts--Oregon 29
- Wildfires 27
- Sawmills 26
- Civilian Conservation Corps (U.S.) 24
- Waterfalls 24
- Coarse woody debris 23
- Fishing 23
- Orchards 22
- Lakes--Oregon 20
- Roads 20
- Cities and towns 19