Subject
- Agricultural pests -- Control -- Congresses7
- Vegetable gardening -- Oregon6
- Apples -- Diseases and pests3
- Beans -- Varieties2
- Codling moth -- Control2
- Fertilizers -- Oregon2
- Fireproofing of wood2
- Nitrogen fertilizers2
- Ocean temperature -- Pacific Ocean2
- Tomatoes -- Varieties2
- Weeds -- Control2
- Acid soils -- Oregon -- Willamette River Valley1
- Agricultural pests -- Integrated control1
- Alfalfa -- Oregon -- Willamette River Valley -- Growth1
- Apple scab -- Control1
- Barley -- Fertilizers1
- Barley -- Planting time1
- Barley -- Yields1
- Bayocean (Or.)1
- Best management practices (Pollution prevention) -- Northwest, Pacific1