Subject
- Agriculture -- Economic aspects -- Oregon -- Jefferson County3
- Dairy farming -- Economic aspects -- Oregon3
- Irrigation farming -- Economic aspects -- Oregon -- Jefferson County3
- Dry farming -- Economic aspects -- Oregon -- Wasco County2
- Irrigation farming -- Economic aspects2
- Sprinkler irrigation -- Economic aspects -- Oregon -- Willamette River Valley2
- Wheat -- Economic aspects -- Oregon -- Wasco County2
- Agricultural credit1
- Agriculture -- Economic aspects1
- Agriculture -- Oregon1
- Columbia River Valley1
- Corn -- Fertilizers -- Economic aspects -- Oregon -- Willamette River Valley1
- Corn -- Irrigation -- Economic aspects -- Oregon -- Willamette River Valley1
- Corn -- Yields -- Oregon -- Willamette River Valley1
- Cropping systems -- Economic aspects -- Sri Lanka1
- Cropping systems -- Sri Lanka -- Decision-making1
- Dairy farming -- Economic aspects -- Oregon -- Tillamook County1
- Endangered species -- Law and legislation -- Economic aspects -- Oregon -- Upper Klamath Lake Watershed1
- Farm management1
- Farm rents -- Oregon -- Willamette River Valley1