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

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

Technology availability
Available Unavailable

Civilizations bonuses Edit

  • Franks: Crop Rotation is free.

History Edit

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.
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