Corn futures at the Chicago Board of Trade were lower early on Thursday as the record large global supply of feed grains and exports that were merely routine weighed on the market, traders said. A sharp drop in soy and wheat also led to spillover pressure in the corn futures pit, they said. At 10:14 am CST (1614 GMT), CBOT March corn was down 2-1/2 at $1.96-1/4 per bushel. Deferred months were down 1-3/4 to 2-1/4 cents.