SINGAPORE  - Chicago soybean futures slid for a second session on Tuesday with prices coming under pressure from lack of Chinese demand for U.S. supplies amid a trade war between the two countries.

Wheat lost more ground although the market is expected to be supported by expectations of higher demand for U.S. supplies as exporters in the Black Sea region run out of surpluses following strong pace of sales.

The most-active soybean contract on the Chicago Board Of Trade was down 0.1 percent at $9.09 a bushel by 0244 GMT, near the session low of $9.06 a bushel - the weakest since Dec. 6.

Wheat slid 0.2 percent to $5.24 a bushel, having closed down 1.1 percent on Monday and corn was unchanged at $3.84 a bushel, having closed 0.4 percent lower in the previous session.

"U.S. export data is miserable and there are lots of trade war risks," said Phin Ziebell, senior economist at National Australia Bank. "There has been no news on the promised Chinese buying."

China and the United States discussed the road map for the next stage of their trade talks on Tuesday, during a telephone call between Chinese Vice Premier Liu He and U.S. Treasury Secretary Steven Mnuchin and Trade Representative Robert Lighthizer.

    The country imported 5.38 million tonnes of soybeans in November, the lowest monthly amount in two years, customs data showed on Saturday.

The market is focused on monthly supply and demand report to be issued by the U.S. Department of Agriculture at 1700 GMT. 

Analysts, on average, expect only modest changes for U.S. soy, corn and wheat ending stocks for the 2018-19 marketing year.

Brazil's soybean farmers are expected to export a record 82.7 million tonnes of the oilseed this year, according to data released on Monday from crushers association Abiove, driven by strong Chinese demand.

Large speculators trimmed their net short position in CBOT corn futures in the week to Dec. 4, regulatory data released on Monday showed.

The Commodity Futures Trading Commission's weekly commitments of traders report also showed that noncommercial traders, a category that includes hedge funds, trimmed their net short position in CBOT wheat and trimmed their net short position in soybeans.

(Reporting by Naveen Thukral; Editing by Amrutha Gayathri)

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