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Topic
- Oregon Agricultural College. Experiment Station 15
- Plants, Cultivated--Field experiments 12
- Sulfur fertilizers 12
- Hens 2
- Knowlton, Frank L. (Frank Lester), 1894-1940 2
- Poultry 2
- Universities and colleges--Faculty 2
- Nitrogen fertilizers 1
- Oregon State Agricultural College. Agricultural Experiment Station 1
- Potassium fertilizers 1
Work Type
- black-and-white photographs 15
- photographic prints 15
- photographs 15
Region
- Oregon >> United States 15
Language
- English 15
Format
- image/tiff 15
Collection
- Historical Images of Oregon State University 15
- OSU Special Collections & Archives Research Center 15