Subject
- Weeds -- Control42
- Pesticides -- Application -- Oregon -- Willamette River Valley41
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley41
- Herbicides38
- Agricultural experiment stations -- Research -- Oregon -- Jackson County37
- Agriculture -- Oregon -- Jackson County -- Field experiments37
- Entomology37
- Greenhouse gases -- Forecasting27
- Animal population density21
- Carcinus maenas -- Oregon21
- Introduced aquatic organisms -- Oregon21
- Agriculture -- Oregon -- Statistics17
- Carcinus maenas -- Washington17
- Introduced aquatic organisms -- Washington17
- Agricultural estimating and reporting -- Oregon16
- Farm produce -- Oregon -- Statistics16
- Grapes -- Diseases and pests -- Control -- Oregon14
- Viticulture -- Oregon14
- Contributions in education and outreach12
- Noxious weeds -- Control -- Oregon12