Barns or other outbuildings necessary for crop and tree farming, but not including stables, corrals, paddocks or other enclosures or buildings for the keeping of animals or fowl, and providing the permitted building is located no closer than 50 feet from any property line. No barns or outbuildings shall be located closer than 50 feet from any other building on the same property, and no closer than 100 feet from a recognized stream bank unless it abuts an area zoned FH or AG, in which case they may be 50 feet from any property line.