Exempt from the provisions of this title, as provided by state statutes, are farm residences and other buildings and structures used for agricultural purposes on farms. To be considered exempt, such residence, building, or structure shall be located on a farm that is such in fact and not in name only and be accessory to the cultivation of crop acreage or other agricultural operations of such extent and character as generally prevail on farms. (1977 Code § 4-1-4)