to this point, the US isn't the single biggest producer, or consumer -- that'd be China. but they are the single largest exporter of grain overall, mostly corn

to this point, the US isn't the single biggest producer, or consumer -- that'd be China. but they are the single largest exporter of grain overall, mostly corn from the midwest and California produce. the Green Revolution hit hard, and most farms are now huge consolidated enterprises. by comparison, in a lot of the world, most farms are smaller and often single family, and in many cases still using old world techniques -- e.g. non-trivial numbers of people plowing their fields with oxen, etc.