The use of any lot, portion of a lot, or tract of land for the storage, keeping or abandonment of junk, including scrap metals or other scrap materials, or for the dismantling, demolition or abandonment of automobiles or other vehicles or machinery or parts thereof; provided, that this definition shall not be deemed to include such uses which are clearly incidental to and accessory to any agricultural use permitted in the zone. (PZSC § 03-15-063)