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An Oasis adds 2 food to a scrub forest or desert tile, and 4 food to a tile worked by Expert Farmers.

If the scrub forest is cleared from the tile, the Oasis will be removed as well.

Sid Meier's Colonization Resources

BeaverFisheryGameMineralsOasisOre depositPrime cottonPrime sugarPrime timberPrime tobaccoSilver depositWheat