Subject
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley6
- Pesticides -- Application -- Oregon -- Willamette River Valley5
- Apples -- Diseases and pests -- Control -- Columbia River Valley3
- Cherry -- Diseases and pests -- Control -- Columbia River Valley3
- Fruit -- Diseases and pests -- Control -- Columbia River Valley3
- Pear -- Diseases and pests -- Control -- Columbia River Valley3
- Pesticides -- Application -- Columbia River Valley3
- Spraying and dusting in agriculture -- Columbia River Valley3
- Wetlands -- Monitoring3
- Forests and forestry -- Measurement2
- Forests and forestry -- Measurement -- Software2
- Hazelnuts -- Pollination -- Northwest, Pacific2
- Irrigation -- Oregon, Eastern -- Management2
- Lace bugs2
- Lace bugs -- Control2
- Liming of soils -- Oregon, Western2
- Microirrigation2
- Microirrigation -- Treasure Valley (Idaho and Or.)2
- Oak -- Diseases and pests -- Control -- California2
- Oak -- Diseases and pests -- Control -- Oregon2