This article is about the technology in Age of Empires. For the related technology in Age of Mythology, see Irrigation (Age of Mythology).
Irrigation is an economic upgrade featured in Age of Empires. This technology can be researched at the Market for 300 food and 100 wood once the player reaches the Iron Age and is the last upgrade that enhances farming productivity. Once researched, the total amount of Food available on a Farm increases by 125 points.