Subject
- Agriculture -- Oregon -- Statistics196
- Farm produce -- Oregon -- Statistics194
- Game protection -- Oregon147
- Game and game-birds -- Oregon146
- Fisheries -- Oregon136
- Oregon State University -- Curricula110
- Forests and forestry -- Oregon58
- Wildlife management -- Oregon58
- Agricultural pests -- Control -- Congresses44
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley43
- Pesticides -- Application -- Oregon -- Willamette River Valley41
- Forests and forestry -- Northwest, Pacific40
- Oregon State University. College of Forestry39
- Entomology38
- Lane County (Or.) -- History38
- Agricultural experiment stations -- Research -- Oregon -- Jackson County37
- Agriculture -- Oregon -- Jackson County -- Field experiments37
- Fishing -- Oregon37
- Hunting -- Oregon37
- Forests and forestry -- Research -- Oregon30