Subject
- Dairy farming -- Economic aspects -- Oregon3
- Dairy plants -- Economic aspects3
- Irrigation farming -- Economic aspects -- Oregon -- Jefferson County3
- Agriculture -- Economic aspects -- Oregon -- Jefferson County2
- Dry farming -- Economic aspects -- Oregon -- Wasco County2
- Irrigation farming -- Economic aspects2
- Wheat -- Economic aspects -- Oregon -- Wasco County2
- Agriculture -- Oregon1
- Butter1
- Cheese factories -- Economic aspects1
- Columbia River Valley1
- Cropping systems -- Economic aspects -- Sri Lanka1
- Cropping systems -- Sri Lanka -- Decision-making1
- Dairy cattle -- Breeding -- Societies, etc. -- Economic aspects1
- Dairy cattle -- Economic aspects -- Oregon1
- Dairy cattle -- Evaluation1
- Dairy cattle -- Productivity1
- Dairy cattle -- Standards1
- Dairy farming -- Economic aspects1
- Dairy farming -- Economic aspects -- Oregon -- Tillamook County1