CBOT corn futures turned 4 to 5 cents per bushel higher in early trade on Monday following gains in crude oil and on short-covering, traders said. Wheat futures followed corn higher. At 12:42 pm CDT (1742 GMT), CBOT corn was up 1 to 4-1/2 cents, per bushel with July up 2-3/4 at $7.23-3/4. July wheat was up 1/2 at $8.67.