GRAINS-Soybeans ease as U.S. harvest advances, USDA report ahead

* Soybeans turn lower after earlier extending Monday gain

* U.S. harvest 90 pct done, focus shifts to Nov. 10 report

* Possible cut to USDA yield, Brazil weather underpin prices

* Wheat eases after bounce, corn weak on harvest pressure

(Updates with European trading, changes dateline/byline) PARIS, Nov 7 (Reuters) - Chicago soybean futures turned lower on Tuesday after weekly data showed the U.S. harvest had reached its final stages, while caution ahead of monthly crop forecasts also encouraged prices to consolidate. Soybeans remained underpinned by weather risks in Brazil, the world's biggest grower of the oilseed, and expectations the U.S. Department of Agriculture (USDA) will trim its U.S. yield estimate in Thursday's crop report. Corn eased for a third consecutive session as harvest progress and good expected yields in the United States weighed on the market. Wheat fell about 1 percent to give up most of its gains from Monday when the market saw short-covering following contract lows last week. The Chicago Board of Trade's most-active soybean contract was down 0.2 percent at $9.92-1/2 a bushel by 1319 GMT, giving up a small earlier gain to hold below the psychological $10 threshold. U.S. farmers have finished harvesting 90 percent of the soybean crop, almost matching the five-year average pace of 91 percent, the USDA said after the market closed on Monday. The agency said 70 percent of the corn crop has been harvested, in line with market expectations although still well below the five-year average pace of 83 percent. "In the fields, harvesting works are slowly catching up on the delays," consultancy Agritel said of the U.S. soybean and corn crops. "Operators are focusing their attention on the publication of the next monthly USDA report," it added. Analysts, on average, expect the USDA in its monthly crop supply and demand report on Thursday to raise its U.S. corn yield forecast and trim its soybean yield outlook. Soybeans have drawn some support from weather risks to the growing season in Brazil. Newly planted crops are facing high temperatures this week in the main Mato Grosso growing region, although significant rainfall forecast for mid-week could limit any stress. Corn dropped 0.3 percent to $3.47 a bushel, edging down for a third session in a row. Wheat fell 1.0 percent to $4.26-1/2 a bushel, having closed up 1.2 percent on Monday. On the export front, the USDA confirmed a 130,000 tonne corn sale on Monday while Iraq's government said it bought 500,000 tonnes of U.S. hard red winter wheat. However, wheat markets remain capped by ample global supplies, marked by a record harvest this year in top exporter Russia.

Prices at 1319 GMT

Last Change Pct End Ytd Pct Move 2016 Move CBOT wheat 426.50 -4.25 -0.99 408.00 4.53 CBOT corn 347.00 -1.00 -0.29 352.00 -1.42 CBOT soy 992.50 -1.50 -0.15 1004.00 -1.15 Paris wheat Dec 162.50 -0.25 -0.15 175.00 -7.14 Paris maize Nov 157.25 0.25 0.16 171.00 -8.04 Paris rape Nov 382.25 0.00 0.00 393.00 -2.74 WTI crude oil 57.32 -0.03 -0.05 53.72 6.70 Euro/dlr 1.16 -0.01 -0.44

Most active contracts - Wheat, corn and soy US cents/bushel, Paris futures in euros per tonne

(Reporting by Gus Trompiz and Naveen Thukral; Editing by Christian Schmollinger and David Evans)