What was one of the methods used by the Incas to preserve food?

The Incas developed a method of freeze-drying known as "ch'aqtu," which was instrumental in preserving food at high altitudes in the Andes Mountains. This process involved exposing food, such as potatoes or maize, to cold air and sunlight. The moisture in the food would evaporate rapidly due to the dry, cold conditions, effectively preserving the nutrients and allowing it to be stored for long periods without spoiling. The freeze-dried foods could be reconstituted with water when needed, making them a practical resource for the Incas as they traversed the challenging mountainous terrain and faced varying climates.

Inca methods significantly contributed to their agricultural efficiency andfood security, which were crucial for sustaining their large empire. While salting, fermentation, and smoking are also traditional food preservation methods, they were not as prominently utilized in Incan culture for the preservation of staple foods as freeze-drying was.