Why are farmers today less successful than the Incas? How have modern farmers in the region adopted Incan farming methods?

In attempting to use farming techniques not suited to the region, farmers in the Andes had weak crop yields. However, these same farmers are adopting the complex Incan farming methods with great success. For instance, growing corn, quinoa, and squash together forms a symbiotic relationship in which each plant benefits the other.

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Answer:The ghost of the Incas' farming achievements still shadows the Andes. The remnants of ancient terraces appear as lines of green on the mountains