CHICAGO (AP) _ Grain futures were mostly lower in early trading Wednesday on the Chicago Board of Trade. Sept. corn…CHICAGO (AP) _ Grain futures were mostly lower in early trading Wednesday on the Chicago Board of Trade. Sept. corn fell by 0.5 cent at $4.42 a bushel. Sept. wheat fell by 0.5 cent at $6.38 a bushel. Beef was lower and pork was lower on the Chicago Mercantile Exchange.