Age of Empires Series Wiki
Age of Empires Series Wiki

Using Aztec floating garden methods, your villagers gather Food from Mills faster, and Boats gather from Fish and Whales faster.
—In-game description

Aztec Chinampa is a technology in the vanilla Age of Empires III that can be researched at a Trading Post built on an Aztec settlement. Once researched, it increases the gather rate of Settlers, Coureurs des Bois and Settler Wagons from Mills as well as Fishing Boats and Caravels/Galleys by 20%.

This technology was, to some degree, replaced by Punjabi New Year in The Asian Dynasties.