Peru

Home of the pre-Inca Colla tribes. Later conquered by Inca. We're real high up, now. It's over 13,000 ft. in elevation. The Colla figured out how to best farm in this environment. They create these raised beds (or camel backs) with irrigation channels in between. This allows for good irrigation, without flooding and also the moisture maintains an stable temperature for the crops--nothing freezes.

The Inca caught on to this technology when they conquered the area. Unfortunately, some of this farming knowledge was lost in Peru when the Inca were conquered.