Historical Images of Oregon State University
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Topic
- Plants, Cultivated--Field experiments 32
- Sulfur fertilizers 27
- Oregon Agricultural College. Experiment Station 24
- Potassium fertilizers 6
- Nitrogen fertilizers 5
- Tillage--Research 5
- Phosphatic fertilizers 1
Rights
- No Copyright - United States 32
Format
- image/tiff 32
Institution
- Oregon State University 32
Decade
- 1920-1929 32