- Agriculture--Economic aspects (2)
- 農業経営 (2)
- Acreage allotments--Organization for Economic Cooperation and Development countries (1)
- Agricultural price supports--Organization for Economic Cooperation and Development countries (1)
- Agriculture and state--Congresses (1)
- Agriculture and state--Organization for Economic Cooperation and Development countries (1)
- Agriculture, Cooperative (1)
- Agriculture, Cooperative--Europe (1)
- Agriculture--Economic aspects--Europe (1)
- Agriculture--Economic aspects--North America (1)
- Agriculture--Statistics (1)
- Capital (1)
- Education, Higher--Aims and objectives (1)
- Farm engines--Testing (1)
- Farm income (1)
- Farm production quotas--Organization for Economic Cooperation and Development countries (1)
- Farmers, Part-time (1)
- Farmers--Supplementary employment (1)
- Farms, Size of--Congresses (1)
- Farms, Small (1)
- Food supply--Statistics (1)
- Forage plants--Seeds--Certification (1)
- Graduate students--Statistics (1)
- Grain--Seed (1)
- Higher education and state (1)
- Industrial location (1)
- Information technology--Economic aspects (1)
- Irrigation--Handbooks, manuals, etc (1)
- Labor supply--Effect of automation on (1)
- Land use (1)
- Mangel-wurzel--Seeds--Certification (1)
- Part-time farming (1)
- Part-time farming--Germany, West (1)
- Part-time farming--Japan (1)
- Part-time farming--Norway (1)
- Part-time farming--United States (1)
- Produce trade (1)
- Seeds--Certification (1)
- Sugar beet seeds--Certification (1)
- Universities and colleges (1)
- Universities and colleges--Graduate work (1)
- Universities and colleges--Graduate work--Curricula (1)
- Universities and colleges--Graduate work--Economic aspects (1)
- Water quality management (1)
- Water resources development (1)
- Water--Law and legislation (1)
- Water-supply (1)
- 古典学派[正統学派](経済学) (1)
- 農家経済 (1)
- 食物--統計 (1)