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- Agricultural Chemistry and Engineering Bureau4
- Agricultural Engineering Bureau4
- Food and Drug Administration4
- Food, Drug, and Insecticide Administration4
- Extension Service3
- Plant Quarantine and Control Administration3
- Farm Credit Administration2
- Farm Security Administration2
- Public Roads Bureau2
- Surplus Marketing Administration2
- Consumers' Counsel Division1
- Exhibits Office1
- Foreign Agricultural Relations Office1
- Rural Electrification Administration1