Subject
- 4-H clubs350
- Range plants -- Oregon77
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley42
- Pesticides -- Application -- Oregon -- Willamette River Valley40
- Reforestation -- Oregon33
- Forests and forestry -- Research -- Oregon27
- Agriculture -- Oregon -- Statistics24
- Child rearing22
- Farm produce -- Oregon -- Statistics21
- Forage plants21
- Weeds -- Control20
- Agricultural estimating and reporting -- Oregon19
- Catalogs, Publishers' -- Oregon19
- College publications -- Oregon19
- Spraying and dusting in agriculture -- Oregon16
- Cover crops -- Oregon14
- Finance, Personal14
- Vegetable gardening -- Oregon14
- Grapes -- Diseases and pests -- Control -- Oregon13
- Herbicides13