Core ideas
Agricultural OriginsSecond Agricultural RevolutionGreen RevolutionProduction SystemsVon ThünenFood NetworksSustainability
High-priority distinctions
- Subsistence vs. commercial agriculture: household/community consumption versus market sale.
- Intensive vs. extensive: high inputs per land area versus lower inputs across more land.
- First, Second, and Green Revolutions: domestication, industrial-era changes, and high-yield modern inputs.
- Von Thünen rings: patterns driven by transport cost, land value, perishability, and market distance—not rings to memorize without reasoning.
Apply it
Explain how one change affects yield, labor, land ownership, food security, environment, gender roles, or rural settlement. Models are simplified tools, so be ready to identify a real-world limitation.