Subject
- Climatic changes -- Pacific Ocean17
- Agricultural pests -- Control -- Congresses8
- Vegetable gardening -- Oregon8
- Grass seed industry -- Oregon4
- Barred owl -- Reproduction3
- Fertilizers -- Oregon3
- Northern spotted owl -- Reproduction3
- Alfalfa -- Fertilizers -- Oregon, Western2
- Beans -- Varieties2
- Forest insects -- Control -- Oregon2
- Forest insects -- Oregon2
- Forest management -- Congresses2
- Gaeumannomyces graminis -- Control -- Oregon2
- Geology -- Hells Canyon (Idaho and Or.)2
- Grasses -- Seeds -- Research -- Oregon2
- Hill farming -- Congresses2
- Hillside planting -- Congresses2
- Liming of soils2
- Nitrogen fertilizers2
- Pacific ocean perch2