Subject
- 4-H clubs67
- Reforestation -- Oregon26
- Forests and forestry -- Research -- Oregon25
- Grapes -- Diseases and pests -- Control -- Oregon11
- Viticulture -- Oregon11
- Agriculture -- Oregon -- Statistics10
- Fungicides -- Oregon10
- Pesticides -- Application -- Oregon10
- Spraying and dusting in agriculture -- Oregon10
- Farm produce -- Oregon -- Statistics8
- Fruit -- Diseases and pests -- Control -- Columbia River Valley7
- Pesticides -- Application -- Columbia River Valley7
- Spraying and dusting in agriculture -- Columbia River Valley7
- Agricultural estimating and reporting -- Oregon6
- Apples -- Diseases and pests -- Control -- Columbia River Valley5
- Cherry -- Diseases and pests -- Control -- Columbia River Valley5
- Pear -- Diseases and pests -- Control -- Columbia River Valley5
- Agricultural pests -- Control -- Oregon -- Willamette River Valley4
- Finance, Personal4
- Fruit -- Diseases and pests -- Oregon -- Willamette River Valley4