Corn futures also fell Friday but settled higher for the week, breaking a month-long losing streak. Each commodity opened higher on the back of better US jobs data but the agriculture futures reversed course as the dollar strengthened after credit rating agency Fitch cut the credit ratings, adding to the bad news in Europe's credit and banking crisis. The US harvest is advancing under perfect weather conditions, further pressuring corn and soy futures, with soybeans posting their longest stretch of declines in two years and easing 20 percent in about a month. "We stumbled into the close," said Jerry Gidel, analyst at North American Risk Management Inc in Chicago. "The biggest problem is that we have harvest pressure that seems like it's going to last forever." Traders were reluctant to invest more money in grain futures until there were clearer signals on Europe's debt crisis, which has dominated trading all week along with the gyrating dollar. Volatile trading was expected ahead of the monthly US Agriculture Department crop report, due on Wednesday. Corn futures for December delivery shed 5-1/2 cents on Friday to settle even at the psychological threshold of $6.00 per bushel at at the Chicago Board of Trade, gaining 1.7 percent for the week. CBOT November soybeans finished 5-1/2 cents lower at $11.58-1/4, losing 1.4 percent for the week and closing near a one-year low. "The dominant issue is harvest," said Don Roose, analyst at US Commodities in West Des Moines, Iowa. "Yields are hard to get a gauge on but it looks like (corn) yields in the western belt are bigger." CBOT December wheat fell 8-1/2 cents lower at $6.07-1/2 per bushel, a loss of about 1.4 percent and narrowly below last week's closing price. Spring wheat futures bucked the the lower trend of commodities, climbing 2.7 percent at the Minneapolis Grain Exchange amid tight supplies of the high-protein wheat variety, pushing Minneapolis wheat futures' premium over Chicago to the highest point since May 2008. Futures rose in early trade after the Labor Department reported a 103,000 rise in US nonfarm payrolls last month, higher than the 60,000 expected by economists polled by Reuters and better than August's upwardly revised 57,000 gain. Even though part of September's relative strength was due to the return of 45,000 striking communications workers, the figures helped increase risk tolerance, pressure the dollar and underpin grains, gold and crude oil. However, seasonal harvest pressure and a forecast for rains in the parched winter wheat belt in the southern US Plains were limiting the upside in grain futures. "We're going to test some lows here," said Allendale Inc analyst Rich Nelson. "It's disappointment that yesterday's attempt at higher prices did not hold."