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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[]

Available Unavailable

Civilization bonuses[]

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

Team bonuses[]

  • Portuguese: Researching Crop Rotation is 25% faster.

Changelog[]

Rise of the Rajas[]

  • Vietnamese: Crop Rotation costs the regular price.

Definitive Edition[]

Lords of the West[]

Dynasties of India[]

Return of Rome[]

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

History[]

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
Villager Wheelbarrow Hand Cart
Food Horse Collar Heavy Plow Crop Rotation
Gillnets
Domestication Pastoralism Transhumance
Wood Double-Bit Axe Bow Saw Two-Man Saw
Gold Gold Mining Gold Shaft Mining
Caravan
Stone Stone Mining Stone Shaft Mining
Civilian ships Dry Dock · Shipwright
Market Coinage Banking
Guilds
Military technologies
General Conscription
Heresy · Devotion Faith
Upgrades
Melee units Forging Iron Casting Blast Furnace
Cavalry Bloodlines · Husbandry
Scale Barding Armor Chain Barding Armor Plate Barding Armor
Infantry Gambesons · Squires · Arson
Scale Mail Armor Chain Mail Armor Plate Mail Armor
Ranged units Ballistics · Chemistry
Fletching Bodkin Arrow Bracer
Archers Padded Archer Armor Leather Archer Armor Ring Archer Armor
Thumb Ring · Parthian Tactics
Siege Siege Engineers
Ship Careening Dry Dock
Shipwright
War Galley
Building Town Watch Town Patrol
Masonry Architecture
Heated Shot · Arrowslits · Murder Holes · Treadmill Crane · Hoardings · Bombard Tower
Herbal Medicine
Monk Redemption · Atonement · Sanctity · Fervor · Illumination · Block Printing · Theocracy
Villager Loom · Sappers
Miscellaneous technologies
Spies · Treason · Unique technologies
Removed/cut generic technologies
Bombard Cannon · Cannon Galleon · Cartography · Hand Cannon · Hunting Dogs · Revetments · Supplies · Tracking