GRAINS-Soybeans gain on lackluster harvest sales, lower yield outlook

By Karl Plume

CHICAGO, Oct 8 (Reuters) - U.S. soybean futures rose for a second straight day on Wednesday on expectations that U.S. harvest yields will be lower than the latest government forecast and on limited sales by farmers awaiting news from U.S.-China trade talks and details of government aid.

Corn followed soybeans higher as an expected yield forecast cut underpinned the market, although gains were limited by projections for a record-large U.S. crop.

Wheat futures were narrowly mixed near five-year lows, with prices capped by a stronger dollar and rising global supplies.

Corn and soybeans gained despite the ongoing U.S. harvest, but both markets have struggled to break out of recent ranges as a U.S. government shutdown has disrupted agricultural data and deprived the market of its usual direction.

Analysts polled by Reuters expect the latest yield estimates from the U.S. Department of Agriculture to be reduced when the agency resumes reporting data. Its monthly supply and demand report, originally scheduled for release on Thursday, will not be issued.

"I don't feel like we're getting a whole lot of harvest pressure in beans. Farmers are not aggressively selling beans even though they are aggressively harvesting beans," said Ted Seifried, chief market strategist for Zaner Ag Hedge.

Cash basis values around the Midwest have been firm this week due to slower-than-normal sales.

Optimism that a meeting between U.S. President Donald Trump and China's Xi Jinping at the end of the month could revive Chinese buying of U.S. soybeans offered additional support, Seifried said.

The market is awaiting details of a farm aid package that could help growers struggling with China's lack of purchases.

Soybeans were also underpinned by labor tensions in Argentina, where workers at soy processors called for a strike this week.

Chicago Board of Trade November soybeans SX25 rose 5-3/4 cents to $10.27-3/4 a bushel by 12:40 p.m. CDT (1740 GMT), while December corn CZ25 added 1-1/4 cents to $4.21 a bushel. CBOT December wheat was unchanged at $5.06-3/4 a bushel.