For field corn, or dent corn as it's sometimes called, there is approximately 1/3 to 1/2 of a pound of shelled corn on an ear.
depends on the size
It varies depending on the type of corn, whether it is fresh or dried, and the size of the ear, but it normally ranges from four to five ounces to nearly a pound.
As much as a frozen ear of corn!
1 - 10oz frozen corn = 3 medium ears of corn.