Limit your search
Topic
- Plants, Cultivated--Field experiments 17
- Oregon Agricultural College. Experiment Station 12
- Sulfur fertilizers 12
- Tillage--Research 5
- Nitrogen fertilizers 1
- Potassium fertilizers 1
Work Type
- black-and-white photographs 17
- photographic prints 17
- photographs 17
Language
- English 17
Local Collection Name
- Agricultural Experiment Station Photographic Collection, ca. 1900-1988 (P 029) 17
Format
- image/tiff 17
Decade
- 1920-1929 17