Subject
- Potatoes -- Oregon -- Klamath County12
- Green manuring -- Oregon, Eastern1
- Meloidogyne -- Control -- Columbia River Watershed1
- Meloidogyne -- Control -- Oregon -- Klamath Basin1
- Meloidogyne -- Control -- San Luis Valley (Colo. and N.M.)1
- Potatoes -- Clones -- Variation -- Oregon1
- Potatoes -- Diseases and pests -- Control -- Columbia River Watershed1
- Potatoes -- Diseases and pests -- Control -- Oregon -- Klamath Basin1
- Potatoes -- Diseases and pests -- Control -- Oregon, Eastern1
- Potatoes -- Diseases and pests -- Control -- San Luis Valley (Colo. and N.M.)1
- Potatoes -- Diseases and pests -- Oregon, Western1
- Potatoes -- Diseases and pests -- Washington (State), Western1
- Verticillium dahliae -- Control -- Oregon, Eastern1
- Verticillium wilt diseases -- Control -- Oregon, Eastern1