Ears of corn are fit and proper resemblances of the thing here intended, both because the fertility of a land doth mainly consist in the abundance and goodness of these; and because ears of corn appearing to any in a dream, did, in the judgment of the Egyptian wise men, signify years, as Josephus notes.
Related Commentaries of Genesis 41:5
Genesis 41:5
5 And he slept and dreamed the second time: and, behold, seven ears of corn came up upon one stalk, ranka and good.