Subject
- Agriculture -- Oregon2
- Apple -- Diseases and pests -- Oregon2
- Aphididae -- Oregon1
- Budding1
- Fire-blight -- Oregon1
- Forage plants -- Oregon1
- Fruit trees -- Diseases and pests -- Control -- Oregon1
- Kale -- Oregon1
- Nuts -- Oregon1
- Pear -- Diseases and pests -- Oregon1
- Pollination1
- Spraying and dusting in agriculture -- Oregon1
- Swine -- Oregon1
- Vegetable gardening -- Oregon1
- Walnut1