Subject
- Agriculture -- Oregon -- Statistics456
- Farm produce -- Oregon -- Statistics451
- 4-H clubs336
- Range plants -- Oregon77
- Reforestation -- Oregon51
- Forests and forestry -- Research -- Oregon45
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley42
- Pesticides -- Application -- Oregon -- Willamette River Valley40
- Forage plants21
- Child rearing20
- Agricultural estimating and reporting -- Oregon19
- Catalogs, Publishers' -- Oregon19
- College publications -- Oregon19
- Weeds -- Control18
- Spraying and dusting in agriculture -- Oregon16
- Cover crops -- Oregon14
- Finance, Personal14
- Grapes -- Diseases and pests -- Control -- Oregon14
- Viticulture -- Oregon14
- Herbicides13