Subject
- 4-H clubs740
- Agricultural pests -- Control -- Congresses254
- Agriculture -- Oregon196
- Potatoes -- Oregon -- Klamath County156
- Agriculture130
- Fisheries -- Oregon127
- Forests and forestry -- Oregon124
- Herbicides124
- Vegetable gardening -- Oregon114
- Game and game-birds -- Oregon113
- Game protection -- Oregon113
- Weeds -- Control83
- Range plants -- Oregon79
- Forests and forestry -- Research -- Oregon73
- Douglas fir71
- Forests and forestry -- Northwest, Pacific70
- Reforestation -- Oregon69
- Oregon State University. College of Forestry53
- Wheat53
- Fisheries -- Economic aspects50