CHICAGO (AP) _ Grain futures were mostly higher in early trading Wednesday on the Chicago Board of Trade. Dec. corn gained 0.25 cent at $4.49 a bushel. Dec. wheat rose by 0.25 cent at $6.11 a bushel. Dec. oats was down 0.5 cent at $3.54 a bushel. Nov. soybeans rose by 0.75 cent at $12.30...