Subject
- Christmas tree growing -- Northwest, Pacific4
- Barred owl -- Reproduction3
- Northern spotted owl -- Reproduction3
- Agricultural pests -- Control -- Congresses2
- Alfalfa -- Oregon, Eastern2
- Christmas tree growing -- Oregon2
- Christmas trees -- Pruning -- Northwest, Pacific2
- Douglas fir -- Pruning -- Northwest, Pacific2
- Fish hatcheries -- Oregon2
- Fish populations -- Oregon -- Pacific Coast2
- Fish surveys2
- Fish-culture -- Economic aspects -- Oregon2
- Forest management -- Congresses2
- Grass seed industry -- Oregon2
- Grass seed industry -- Oregon, Eastern2
- Grasses -- Seeds -- Research -- Oregon2
- Hill farming -- Congresses2
- Hillside planting -- Congresses2
- Marine animals -- Oregon -- Pacific Coast -- Geographical information2
- Marine fishes -- Oregon -- Pacific Coast2