Page "Andes" Paragraph 21
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The ancient peoples of the Andes such as the Incas have practiced irrigation techniques for over 6, 000 years.
Terracing, however, was only extensively employed after Incan imperial expansions to fuel their expanding realm.
Maize was also an important crop for these people, and was used for the production of chicha, important to Andean native people.
Coca, despite eradication programmes in some countries, remains an important crop for legal local use in a mildly stimulating herbal tea, and, both controversially and illegally, for the production of cocaine.
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