CHICAGO (AP) _ Grain futures were mostly higher in early trading Thursday on the Chicago Board of Trade. Sept. corn…CHICAGO (AP) _ Grain futures were mostly higher in early trading Thursday on the Chicago Board of Trade. Sept. corn rose by 0.25 cent at $4.37 a bushel. Sept. wheat rose by 1.5 cents at $6.44 a bushel. Beef was higher and pork was lower on the Chicago Mercantile Exchange.