[Gorzaloon]

Field corn is the mast majority of corn grown in the US and the world and is what goes into ethanol production. I suppose it could be eaten fresh (on the cob) but it wouldn't have much taste. It matures and fills the kernal and then dents and dries down so it can be harvested with a combine. The cobs and husks are left in the field

Is that what some people call "Shell corn"?

[HereInTheHeartland]

Not really familiar with that term; I guess shelled corn might be a term.
Corn is dry; it is stored at around 15% moisture. Harvested as dry as possible, then is normally dried with LP or natural gas fired dryers immediately after harvest.

If you see dry ears sold in grocery stores for squirrels to eat; that is field corn. The same corn farmers harvest; but farmers would run it through a combine in the field and separate the corn from the cob.