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Creator
- Oregon State University. Agricultural Experiment Station 34
Topic
- Plants, Cultivated--Field experiments 34
- Sulfur fertilizers 27
- Oregon Agricultural College. Experiment Station 25
- Potassium fertilizers 6
- Nitrogen fertilizers 5
- Tillage--Research 5
- Fertilizers 1
- Phosphatic fertilizers 1
Type
- Image 34
Format
- image/tiff 34