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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 1,019 food, and with a Chinese ally, they get 1,130 food, giving the Sicilian farms the largest amount of food in the game.

Availability chart[]

Croprotationavailable AvailableCroprotationunavailable Unavailable

Civilization bonuses[]

  • Burgundians AoE2 Burgundians: Can research Crop Rotation in the Castle Age. Crop Rotation costs -33% food.
  • Franks AoE2 Franks: Crop Rotation is free.
  • Sicilians AoE2 Sicilians: Crop Rotation provides +125% additional food to Farms.
  • Vietnamese AoE2 Vietnamese: Researching Crop Rotation is 100% faster and costs no wood.

Team bonuses[]

  • Portuguese AoE2 Portuguese: Researching Crop Rotation is 25% faster.


AoE2-DLCicon-4 Rise of the Rajas[]

  • Vietnamese AoE2 Vietnamese: Crop Rotation costs the regular price.

AoEIIDE icon Definitive Edition[]

AoE2Icon-LordsWest Lords of the West[]

AoE2Icon-DynastiesIndia Dynasties of India[]

AoE2Icon-ReturnRome Return of Rome[]

  • Vietnamese: With update 87863, researching Crop Rotation is 100% faster.


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.
Age of Empires II: The Age of Kings manual
Technologies in Age of Empires II
Economic technologies
MaleVillDEFEMALEVILLDE VillagerWheelbarrowDE Wheelbarrow · HandcartDE Hand Cart
Aoe2de food FoodHorseCollarDE Horse Collar · HeavyPlowDE Heavy Plow · CropRotationDE Crop Rotation
GillnetsDE Gillnets
Aoe2de wood WoodDoubleBitAxe aoe2DE Double-Bit Axe · BowSawDE Bow Saw · TwoManSawDE Two-Man Saw
Aoe2de gold GoldGoldMiningDE Gold Mining · GoldShaftMiningDE Gold Shaft Mining
CaravanDE Caravan
Aoe2de stone StoneStoneMiningDE Stone Mining · StoneShaftMiningDE Stone Shaft Mining
Civilian shipsDryDockDE Dry Dock · ShipwrightDE Shipwright
Market aoe2DE MarketCoinageDE Coinage · BankingDE Banking
GuildsDE Guilds
Military technologies
GeneralConscriptionDE Conscription
HeresyDE Heresy · Devotion icon AoE2DE Devotion · FaithDE Faith
Melee unitsForging aoe2de Forging · IronCastingDE Iron Casting · BlastFurnaceDE Blast Furnace
CavalryBloodlinesDE Bloodlines · HusbandryDE Husbandry
ScaleBardingArmorDE Scale Barding Armor · ChainBardingDE Chain Barding Armor · PlateBardingArmorDE Plate Barding Armor
InfantrySuplliesicon Supplies · AoE2 Gambesons Gambesons · SquiresDE Squires · ArsonDE Arson
ScaleMailArmorDE Scale Mail Armor · ChainMailArmorDE Chain Mail Armor · PlateMailArmorDE Plate Mail Armor
Ranged unitsBallisticsDE Ballistics · ChemistryDE Chemistry
FletchingDE Fletching · BodkinArrowDE Bodkin Arrow · BracerDE Bracer
ArchersPaddedArcherArmorDE Padded Archer Armor · LeatherArcherArmorDE Leather Archer Armor · RingArcherArmorDE Ring Archer Armor
ThumbRingDE Thumb Ring · ParthianTacticsDE Parthian Tactics
SiegeSiegeEngineersDE Siege Engineers
ShipCareeningDE Careening · DryDockDE Dry Dock
ShipwrightDE Shipwright
WarGalleyDE War Galley
BuildingTownWatchDE Town Watch · TownPatrolDE Town Patrol
Masonry aoe2de Masonry · ArchitectureDE Architecture
HeatedShotDE Heated Shot · ArrowSlitsDE Arrowslits · MurderHolesDE Murder Holes · TreadmillCraneDE Treadmill Crane · HoardingsDE Hoardings · BombardTower aoe2DE Bombard Tower
HerbalDE Herbal Medicine
MonkRedemptionDE Redemption · AtonementDE Atonement · SanctityDE Sanctity · FervorDE Fervor · IlluminationDE Illumination · BlockPrintingDE Block Printing · TheocracyDE Theocracy
MaleVillDEFEMALEVILLDE VillagerLoomDE Loom · SapperDE Sappers
Miscellaneous technologies
SpiesDE Spies · SpiesDE Treason · UniqueTechCastle-DEUniqueTechImperialDE Unique technologies
Removed/cut generic technologies
Bombardcannonresearch Bombard Cannon · CannongalleonresearchDE Cannon Galleon · Cartography aoe2de Cartography · Handcannon Hand Cannon · Huntingdogs Hunting Dogs · Revetments · TrackingDE Tracking