Subject
- Agriculture -- Economic aspects -- United States4
- Agricultural price supports -- United States2
- Agriculture and state -- United States2
- Airlines -- Economic aspects -- United States2
- Biomass energy -- Economic aspects -- United States2
- Economic development -- United States2
- Forest products industry -- Economic aspects -- United States2
- Forests and forestry -- Economic aspects -- Oregon2
- Income -- United States2
- Logging -- Government policy -- United States2
- Affiliation (Psychology) -- United States1
- Agricultural conservation -- Oregon -- Willamette River Valley -- Economic aspects1
- Agricultural conservation -- Oregon -- Willamette River Valley -- Evaluation1
- Agricultural credit -- United States1
- Agricultural pollution -- Oregon -- Willamette River Valley1
- Agricultural subsidies -- Economic aspects -- United States1
- Agricultural subsidies -- United States1
- Agriculture -- Economic aspects1
- Agriculture -- Economic aspects -- Oregon1
- Agriculture -- Research -- Economic aspects -- United States1