What method of farming did the Incas use?

The Incas primarily used a method of farming known as terrace farming. This technique involved creating stepped agricultural fields on the slopes of the Andes Mountains, which helped to maximize arable land and prevent soil erosion. They also employed irrigation systems to channel water from rivers and streams to their crops, allowing them to cultivate a variety of crops such as potatoes, maize, and quinoa in their diverse climate. This innovative approach enabled the Incas to sustain a large population despite the challenging mountainous terrain.