I imagine you are correct. I was assuming that it was for silage.
For years I have seen corn being harvested when it looks like it has died. I assumed it was for silage as it was just harvested whole.
Maybe they let it dry in the field for cornmeal or popcorn.
Field corn for feed is harvested long after the corn is dead and brown. It gives time for the water to dry out. Silage is green, wet and heavy. Has a very distinct smell too. Tends to mold and can catch fire if not managed properly.