Answer + Explanation:
The Incas were highly skilled in agriculture and were able to farm on steep and rugged terrain in the Andes Mountains. They developed a range of techniques to maximize their crop yields, including the use of terracing, irrigation, and fertilization.
One of the key techniques used by the Incas was terracing, which involved cutting flat platforms into the sides of mountains and hillsides to create arable land. The terraces were built up with soil and rocks, and a complex system of irrigation channels and aqueducts was used to bring water to the crops. This allowed the Incas to grow crops such as potatoes, maize, beans, and quinoa in areas where it would not have been possible otherwise.
In addition to terracing, the Incas also used a technique known as "waru waru," which involved building raised fields in wetland areas. The raised fields were separated by channels filled with water, which helped to regulate the temperature of the crops and provided a source of water for irrigation.
The Incas also used a type of fertilizer known as "guano," which was made from the excrement of seabirds and sea lions. Guano was rich in nitrogen and other nutrients and was highly effective at improving soil fertility.
Overall, the Incas were highly innovative and efficient in their agricultural practices, and their techniques are still studied and used today.