Abandonment, terminating nonconforming use. A nonconforming use, if changed to a conforming use, may not be changed back to a nonconforming use, but a temporary discontinuance of a nonconforming use shall not be deemed a change to a conforming use. The failure to exercise any nonconforming use, except agricultural uses in residential districts, for a period of one-year or more terminates such nonconforming use of the structures or premises, and thereafter such structure or premises shall be used in conformity with this chapter. An agricultural nonconforming use in a residential district shall not be deemed to have been abandoned until the agricultural use has been discontinued and a conforming use is established. A conforming residential use is created when the primary use of the property is a permitted use under Article II of this chapter. Under no circumstances shall the discontinuance of agricultural activities, by itself, be deemed to create a permitted use.