Agricultural engineering
Agricultural science
Agricultural economics or agronomics
Maximizing crop yield

Agribusiness
Soil ecosystem
Production and distribution of food and fibre
Food policy, agricultural policy and environmental policy
Agricultural environment
Natural resources
Food and consumer economics
Production economics
Farm management
Land economics
Agricultural economics and risk management
Agricultural resource management
Soil fertility management
Agricultural infrastructure
Soil management and conservation
Environmental impact assessments
Agricultural product processing
Agricultural machinery, equipment, processing technology, and structures
Water reservoirs, warehouses and other structures
Pollution control at large farms
Developing new forms of biofuels from non-food resources