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- Experiment Stations Office166
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- Statistics Division32
- Soils Division30
- Botany Division28
- Dairy Division23
- Vegetable Physiology and Pathology Division22
- Biological Survey Division21
- Office of Experiment Stations21
- Division of Statistics20
- Chemistry Division19
- Foreign Markets Section17
- Seed and Plant Introduction Section15
- Forestry Division14
- Division of Entomology12