At the Chicago Board of Trade, corn was off 16 to off 17 3/4, soybeans were off 54 to off 58 1/4, wheat was off 25 1/2 to off 27 and oats were off 1 to off 2.

Corn exports came in at 18 percent of the USDA forecast, equal to corn's five-year average. Wheat sales, at 55.1 percent, are ahead of the five-year average of 41.6 percent. Cumulative soybeans sales for the season are slightly ahead, 27.9 percent, compared with a historic average of 22.5 percent.

The prices:

Corn: Sep 5.31 1/2, off 17 3/4; Dec 5.48 1/2, off 16; Mar 5.67 1/4, off 16; May 5.79 1/4, off 16.

Soybeans: Sep 11.80, off 54 ; Nov 11.77, off 58; Jan 11.93 3/4, off 58 1/4, Mar 12.06 3/4, off 57 3/4.

Wheat: Sep 7.29 3/4, off 25 1/2; Dec 7.51 1/2, off 25 1/2; Mar 7.74 3/4, off 26; May 7.88 1/2, off 27.

Oats: Sep 3.27, off 1; Dec 3.41, off 2; Mar 3.58 1/2, off 2; May 3.70 1/2, off 2.