CHICAGO (Dow Jones)--Chicago Board of Trade corn futures ended down Friday, concluding a bearish week under pressure from crop expectations and benign weather.

September corn ended down 10 1/2 cents to $3.00 1/2 a bushel and December corn ended down 9 1/2 cents to $3.06 1/4.

The lack of any frost threat in the two-week forecast continued to weigh on the market, as sentiment continues to build that this year's crop will produce a record yield, possibly well above the record of 160.4 bushels an acre.

The December contract set a new low for the summer in early trade, and the market hit sell stops, which accelerated the losses, said Joel Karlin, an analyst at Western Milling.

The market is closed Monday for the Labor Day holiday, and sentiment could shift if the weather forecasts have changed by the time trade resumes. But without a weather scare the market should continue to move lower, traders and analysts said.

"You've got to say the Sep, at $3, is setting a target for the Dec," said Sid Love, an analyst for Kropf and Love Consulting.

Karlin says that with the huge crop looming, the question is how far new crop ending stocks will climb above 2 billion bushels.

Private firms continue to release bearish crop projections this week. Risk management, research and brokerage firm Linn Group on Friday raised its projections for both U.S. corn and soybean crops, traders said.

Linn Group forecast the 2009-10 corn crop at 13.019 billion bushels, using an average yield of 162.7 bushels an acre. This was above Linn Group's previous estimate made before the August crop report, when the firm pegged the corn crop at 12.330 billion bushels with a yield of 157.6 bushels.

In August, the U.S. Department of Agriculture put the U.S. corn crop at 12.761 billion bushels and soybean output at 3.199 billion. The USDA is scheduled to release updated figures on Sept. 11 at 8:30 a.m. EDT (1230 GMT).

The December contract lost 22 3/4 cents on the week, and ended 1/4 cent above the day's low, which is a new low for the summer.

CBOT oats futures ended lower. September oats ended down 1 1/4 cents at $1.95 3/4 a bushel and December oats ended down 1 1/4 cents at $2.07 3/4.

Ethanol futures were lower. October ethanol ended down $0.025 at $1.544 a gallon and November ethanol ended down $0.027 at $1.528.

-By Ian Berry, Dow Jones Newswires; 312-341-5778;