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- Agriculture -- Oregon -- Marion County 1
- Agriculture -- Oregon -- Statistics 15
- Agriculture -- Oregon -- Tillamook County -- Statistics 1
- Agriculture -- Oregon -- Umatilla County -- Statistics 1
- Agriculture -- Oregon -- Union County -- Statistics 1
- Agriculture -- Oregon -- Washington County -- Statistics 1
- Agriculture -- Research 1
- Agriculture -- Research -- Columbia River Watershed 27
- Agriculture -- Research -- Columbia River Watershed. 1
- Agriculture -- Research -- Lower Columbia River Valley (Or. and Wash.) 2
- Agriculture -- Research -- On-farm -- Oregon 4
- Agriculture -- Research -- Oregon 13
- Agriculture -- Research -- Oregon -- Klamath County 2
- Agriculture -- Research -- Oregon -- Malheur County 2
- Agriculture -- Research -- Oregon -- On-farm 8
- Agriculture -- Research -- Oregon, Eastern 15
- Agriculture -- Research -- Treasure Valley (Idaho and Or.) 1
- Agriculture -- Study and teaching 1
- Agriculture -- Study and teaching -- Oregon 1
- Agriculture -- Study and teaching -- Oregon -- Evaluation 1