Subject
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley44
- Pesticides -- Application -- Oregon -- Willamette River Valley41
- Vegetable gardening -- Oregon35
- Herbicides -- Oregon19
- Grapes -- Diseases and pests -- Control -- Oregon16
- Noxious weeds -- Control -- Oregon14
- Spraying and dusting in agriculture -- Oregon14
- Viticulture -- Oregon12
- Fungicides -- Oregon11
- Pesticides -- Application -- Oregon11
- Beans -- Varieties10
- Pear -- Diseases and pests -- Control -- Oregon -- Willamette River Valley10
- Apples -- Diseases and pests -- Control -- Oregon -- Willamette River Valley9
- Weeds -- Control9
- Blueberries -- Diseases and pests -- Control -- Oregon -- Willamette River Valley8
- Brush -- Control -- Oregon8
- Cherry -- Diseases and pests -- Control -- Oregon -- Willamette River Valley8
- Peach -- Diseases and pests -- Control -- Oregon8
- Peach -- Diseases and pests -- Integrated control -- Oregon8
- Agriculture -- Oregon7