Research topics below this in the hierarchy
- Agriculture (General)
- International cooperation
- Size of farms
- Sharecropping
- Agricultural associations, societies, etc.
- Cooperative agriculture
- Collective farms
- Government owned and operated farms. State farms. Sovkhozes
- Gleaning
- Reclamation of agricultural land. Melioration
- Irrigation
- Agricultural classes. Including farm tenancy, agricultural laborers
- Utilization and culture of special classes of lands. Including pasture lands, water resources development
- Veterinary medicine
- Food industry