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Topic
- Oregon Agricultural College. Experiment Station 65
- Plants, Cultivated--Field experiments 25
- Sulfur fertilizers 24
- Oregon State Agricultural College. Agricultural Experiment Station 12
- Agriculture 7
- Harvesting 7
- Graminaceae 6
- Nitrogen fertilizers 5
- Oregon Agricultural College 4
- Universities and colleges--Faculty 4
- Agricultural machinery 3
- Hens 3
- Knowlton, Frank L. (Frank Lester), 1894-1940 3
- Potassium fertilizers 3
- Poultry 3
- Vetch 3
- Agriculture Hall 1
- Cauthorn Hall 1
- College buildings 1
- Entomology 1
