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- Plant Industry Bureau763
- Animal Industry Bureau407
- Entomology Bureau197
- Agricultural Economics Bureau144
- Entomology and Plant Quarantine Bureau134
- Biological Survey Bureau113
- Agricultural Engineering Bureau97
- Forest Service87
- Dairy Industry Bureau81
- Chemistry and Soils Bureau64
- Home Economics Bureau59
- Public Roads Bureau47
- Soil Conservation Service15
- Information Office9
- Cooperative Extension Work Office7
- Weather Bureau7
- Farm Credit Administration2
- Cooperative Extension Division1
- Plant Quarantine and Control Administration1