Subject
- Agricultural chemicals -- Foliar application6
- Agricultural pests -- Control -- Congresses6
- Insecticides -- Research3
- Colorado potato beetle -- Control2
- Soils -- Agricultural chemical content2
- Agricultural chemicals1
- Agricultural chemicals -- Application1
- Agricultural chemicals -- Environmental aspects1
- Agricultural chemicals -- Environmental aspects -- Oregon -- Lane County1
- Agricultural chemicals -- Environmental aspects -- Oregon -- Willamette River Valley1
- Agricultural chemicals -- Oregon -- Calapooia River Watershed1
- Agricultural laborers -- Diseases -- United States1
- Agricultural pollution1
- Agriculture -- Economic aspects -- Oregon1
- Agriculture -- Oregon -- Willamette River Valley1
- Air -- Pollution -- Risk assessment -- Computer programs1
- Ambystoma macrodactylum -- Effect of chemicals on -- Oregon -- Calapooia River Watershed1
- Ambystoma macrodactylum -- Mortality -- Oregon -- Calapooia River Watershed1
- Ambystoma macrodactylum -- Oregon -- Calapooia River Watershed -- Growth1
- Amphibian declines -- Oregon -- Calapooia River Watershed1