GENERAL COMMENTS:March corn closed down 8 3/4 cents and May corn was down 9 cents. March soybeans closed down 20 1/4 cents and May soybeans were down 21 1/4 cents. March KC wheat closed down 12 3/4 cents, March Chicago wheat was down 16 1/2cents, March Minneapolis wheat was down 11 3/4 cents.The U.S.