Subject
- Potatoes -- Oregon -- Klamath County156
- Agricultural experiment stations -- Research -- Oregon -- Jackson County37
- Agriculture -- Oregon -- Jackson County -- Field experiments37
- Entomology37
- Field experiments -- Oregon -- Klamath County16
- Potatoes -- Varieties -- Oregon -- Klamath County15
- 4-H clubs9
- Fertilizers -- Oregon6
- Herbicides -- Research6
- Poultry -- Housing6
- Weeds -- Control -- Research6
- Fruit trees -- Diseases and pests -- Control5
- Nut trees -- Diseases and pests -- Control5
- Spraying and dusting in agriculture5
- Wheat -- Oregon -- Klamath County5
- Borers (Insects) -- Control -- Oregon4
- Borers (Insects) -- Oregon4
- Weeds -- Control4
- Apple -- Diseases and pests -- Oregon3
- Barley -- Oregon -- Klamath County3