Seems the benefit to the farmer was not so much a reduction in taxes or a reduced rate on the plates, but the convienience factor. The fact that he didn't have to "come into town" but once every 5 years in order to renew his tags would have been a big help to a farmer living out in the country.
What I heard anyway.
Chuck 1950 Chevy 1/2 ton (all original) 1951 Chevy 1/2 ton (future streetrod) 1941 Chevy coupe 1938 Chevy coupe streetrod