CHICAGO (AP) _ Grain futures were mostly lower in early trading Monday on the Chicago Board of Trade. Dec. corn fell by 0.25 cent at $4.47 a bushel. Dec. wheat lost 0.5 cent at $6.03 a bushel. Dec. oats rose by 3.75 cents at $3.48 a bushel. Nov. soybeans fell by 0.5 cent at $12.22...