Subject
- Agricultural pests -- Control -- Congresses18
- Field experiments -- Oregon -- Klamath County16
- Vegetable gardening -- Oregon12
- Agricultural experiment stations -- Research -- Oregon -- Jackson County6
- Agriculture -- Oregon -- Jackson County -- Field experiments6
- Entomology6
- Pear psylla -- Control6
- Pears -- Diseases and pests6
- Beans -- Varieties5
- U.S. International Biological Program. Coniferous Forest Biome5
- Wheat -- Oregon -- Klamath County5
- Oceanography -- Oregon -- Umpqua River Estuary4
- Umpqua River Estuary (Or.)4
- Barley -- Oregon -- Klamath County3
- Beans -- Diseases and pests3
- Codling moth -- Control3
- Two-spotted spider mite -- Control3
- Broccoli -- Growth2
- Broccoli -- Planting2
- Fisheries -- Economic aspects -- Congresses2