- 4-H clubs8
- Soft wheat -- Fertilizers -- Oregon, Western2
- Soft wheat -- Soils -- Oregon, Western2
- Wild plants, Edible -- Northwest, Pacific -- Harvesting2
- Wild plants, Edible -- Northwest, Pacific -- Marketing2
- Winter wheat -- Fertilizers -- Oregon, Western2
- Winter wheat -- Soils -- Oregon, Western2
- Apples -- Fertilizers1
- Blackberries -- Fertilizers -- Oregon, Western1
- Blackberries -- Oregon, Western -- Nutrition1
- Canola -- Fertilizers -- Northwest, Pacific1
- Carrots -- Fertilizers -- Oregon, Eastern1
- Carrots -- Seeds -- Oregon, Eastern1
- Coastal cutthroat trout -- Oregon1
- Corn -- Silage -- Oregon1
- Cranberries -- Fertilizers -- Oregon1
- Deficiency diseases in plants1
- Deficiency diseases in plants -- Diagnosis1
- Deficiency diseases in plants -- Oregon, Western1
- Earthquakes1