. . "Irrigation (Age of Empires)"@en . . "Farms +75 Food"@en . . "100"^^ . . "22"^^ . "Irrigation"@en . . . . "Irrigation is an economic upgrade featured in Age of Empires. This technology can be researched at the Market for and 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 75 points."@en . "300"^^ . . "Irrigation is an economic upgrade featured in Age of Empires. This technology can be researched at the Market for and 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 75 points."@en . .