Subject
- 4-H clubs46
- Agricultural pests -- Control -- Congresses40
- Apples -- Diseases and pests11
- Codling moth -- Control5
- Pear psylla -- Control5
- Pears -- Diseases and pests3
- Agriculture -- Research -- Lower Columbia River Valley (Or. and Wash.) -- Periodicals1
- Almond -- Diseases and pests1
- Cherry -- Diseases and pests1
- Crops -- Research -- Lower Columbia River Valley (Or. and Wash.) -- Periodicals1
- Group facilitation -- Handbooks, manuals, etc.1
- Hazel -- Diseases and pests1
- Irrigation farming -- Lower Columbia River Valley (Or. and Wash.) -- Periodicals1
- Pears -- Diseases and pests -- Hood River Valley (Or.)1
- Pistachio -- Diseases and pests1
- Powdery mildew diseases -- Control1
- Sawmills -- Accounting1
- Sour cherry -- Diseases and pests1
- Strawberries -- Marketing -- Oregon1
- Strawberry industry -- Economic aspects -- Oregon1