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Wheat Field
From Super Fantasy Kingdom Official Wiki
Wheat Fields are the source for 
Wheat in Super Fantasy Kingdom.
Usage
Every run there are 4 × Wheat Fields spawning naturally. Wheat Fields can be harvested by workers assigned to the 
Farm. Upgrading the farm allows to plant new Wheat Fields. A newly planted Wheat Field will regrow if it's harvested on the next day, else it will wither.
Source
Depletable
