Chicago Board of Trade (CBOT) grains futures closed mixed on Friday with corn and wheat futures rising slightly, supported by a round of end-of-week bargain buying after posting sharp declines on Thursday.

Soybeans weakened on technical pressure after the market threatened, but failed to break through a four-week high hit on Thursday. Strong export demand limited the declines.

The most active corn contract for December delivery added 1.5 cents, or 0.42 percent, to 3.5675 dollars per bushel. December wheat delivery rose 0.5 cent, or 0.11 percent, to 4.3775 dollars per bushel. November soybeans went down 6.75 cents,or 0.7percent, to 9.62 dollars per bushel.

In the outside markets, the Brent crude oil market is 1.60 dollars lower, the U.S. dollar is lower, and the Dow Jones Industrials are 38 points higher.

U.S. Commodities grain analyst Jason Roose says that investors are looking ahead to next week.

"Grains are trading mixed today with positioning ahead of Tuesday's official crop report, corn is finding support with solid exports and lack of moisture in the Midwest," Roose says.

Weekly Export Sales Report released Friday by the United States Department of Agriculture show private exporters have exported 375,500 tonnes of wheat, 1.122 million tonnes of corn and 1.154 million tonnes of soybeans during the 2017/2018 marketing year, which began Sept.1.