<Tr> <Td> </Td> <Td> Look up bumper crop in Wiktionary, the free dictionary . </Td> </Tr> <P> In agriculture, a bumper crop is a crop that has yielded an unusually productive harvest . </P> <P> A bumper crop can also be a source of problems, such as when there is insufficient storage space (barns, grain bins, etc .) for an overlarge crop . The word "bumper" has a second definition meaning "something unusually large", which is where this term comes from . </P> <P> The term "bumper crop" has also been used to refer to a similar large result in other activities, or as a pun such as with a group of automobiles (for their front / rear bumpers). </P>

Where did the term bumper crop come from