Subject
- Walnut -- Economic aspects -- Oregon3
- Nuts -- Oregon2
- Walnut -- Diseases and pests -- Northwestern States2
- Walnut industry -- Economic aspects -- Oregon2
- Berries -- Irrigation -- Oregon -- Willamette River Valley1
- Filbert industry -- Oregon1
- Hazelnut industry -- Economic aspects -- Oregon1
- Hazelnuts -- Diseases and pests -- Control -- Northwest, Pacific1
- Hazelnuts -- Diseases and pests -- Northwest, Pacific1
- Hazelnuts -- Economic aspects -- Oregon1
- Hazelnuts -- Losses -- Northwest, Pacific1
- Hazelnuts -- Oregon1
- Narcissus bulbs -- Diseases and pests -- Control1
- Nut trees -- Oregon1
- Nut trees -- Oregon -- Fertilizers1
- Nut trees -- Oregon -- Soils1
- Nuts -- Pollination -- Oregon1
- Soil fertility1
- Strawberries -- Economic aspects -- Oregon -- Willamette River Valley1
- Strawberries -- Oregon -- Willamette River Valley1