FH I would chop the stalks with the bush hog prior to discing or plowing, they will break down much better, last fall we chopped about 1800 acres of stalks before we disced for drilling wheat. Also the corn will grow up and make an ear albeit scrawney and disfigured, it just looks tashy in the field. I would let some of that corn come up then disc it again to clean up the plot before seeding the beans. If you are going to re-seed that plot in corn I would not worry about it.