Subject
- Wood poles -- Maintenance and repair14
- Wood poles -- Preservation14
- Wood poles -- Fumigation13
- 4-H clubs9
- Wood -- Preservation7
- Agricultural pests -- Control -- Congresses5
- Fungicides4
- Pesticides -- Oregon -- Statistics4
- Wood preservatives4
- Western Dry Kiln Association. Meeting3
- Forests and forestry2
- Forests and forestry -- Oregon2
- Groundwater -- Pollution2
- Pesticides -- Environmental aspects2
- 4-H clubs -- Curricula -- Oregon1
- Beef cattle1
- Berries -- Diseases and pests -- Control -- Oregon1
- Conifers -- Oregon -- Growth1
- Douglas fir1
- Eddies -- Mathematical models1