Labor
Fertilizer
Internal migration
Macroregion peripheries
Taiwan
Manchuria
Southwest
Corn, 16th c. (N and SW)
Peanuts, 16th c. (S and SW)
Potatoes, 16th and 17th c. (N and SW)
Sweet potatoes, 18th c. (coastal regions)
Cultural resistance
“Pauper food”
Economic appeal
High altitude
High yield/acre
Lower labor
Easily stored
Spanish sailors
Chinese merchants based in Manila
Silk-Silver trade
Missionaries