Subject
- 4-H clubs739
- Potatoes -- Oregon -- Klamath County156
- Agricultural pests -- Control -- Congresses152
- Vegetable gardening -- Oregon114
- Herbicides110
- Agriculture -- Oregon93
- Forests and forestry -- Oregon87
- Range plants -- Oregon78
- Weeds -- Control78
- Fisheries -- Oregon73
- Forests and forestry -- Northwest, Pacific66
- Game and game-birds -- Oregon65
- Game protection -- Oregon65
- Forests and forestry -- Research -- Oregon57
- Douglas fir53
- Reforestation -- Oregon51
- Fisheries -- Economic aspects50
- Fishing boats -- Economic aspects49
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley44
- Cattle -- Feeding and feeds42