The Ancient Americas
History

An agricultural technique for the non-irrigated cultivation of crops
Dry farming
An agricultural technique for the non-irrigated cultivation of crops. Dry farming. Historically, dry farming allowed people to grow crops in regions with little rainfall by relying on soil moisture conservation techniques.

A method of creating a field by cutting and burning of plants in a forest or woodland
Slash and burn
A method of creating a field by cutting and burning of plants in a forest or woodland, slash and burn. In History, slash and burn is an ancient farming technique used to clear land for agriculture by cutting and burning vegetation.

The zone of warm climate that extends 23º north and south of the equator
Tropical zone
The zone of warm climate that extends 23 north and south of the equator is called the tropical zone. In history, civilizations in the tropical zone developed unique cultures and agriculture due to the warm, consistent climate.