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This article is about the technology in Age of Empires II: The Age of Kings. For other uses, see Crop Rotation.

Crop Rotation is a technology in Age of Empires II that can be researched at the Mill or at the Folwark (Poles only) once the Imperial Age is reached. Once researched, it gives Farms +175 food (for a total of 550) before they need to be reseeded.

Farms that are built before Crop Rotation is researched do not gain the food bonus. If the technology is completed while a Farm is being built, the food bonus applies to that Farm.

The Sicilians already have a civilization bonus which grants extra food by researching all other farm upgrades. As a result, their farms have up to 925 food, and with a Chinese ally, they get 1,017.5 food, giving the Sicilian farms the largest amount of food in the game.

Technology availability
Available Unavailable

Civilization bonuses[]


Rise of the Rajas[]

  • Vietnamese: Crop Rotation costs the regular price.

Definitive Edition[]

Lords of the West[]


With experience over time farmers noted that food production gradually declined on fields where the same crops were planted year after year. Experimentation showed that proper crop rotation could restore high yields. Farmers of the Middle Ages did not understand the science of this result but developed a practical plan through experience. Planting the same crops over and over depleted specific nutrients that a plant needed in quantity. Through crop rotation, different plants were found to restore the nutrients needed by something else. Alfalfa, for example, restores nitrogen to soil from which it has been depleted by other crops. Planting alfalfa restored the soil for the next year and made good winter feed for livestock.