GRAINS-Soy sets 1-month top on export demand, broad commodities strength

* Dry conditions in Brazil may delay soy planting

* Corn up, following firm trend as harvest awaited

* Wheat firm on Southern Hemisphere crop doubts

(Updates prices, adds quotes, changes dateline; previous PARIS/SINGAPORE) CHICAGO, Sept 14 (Reuters) - U.S. soybean futures reached a one-month high on Thursday on robust export demand and worries about conditions in South American crop regions, analysts said. Corn and wheat followed the firm trend, drawing additional support from broad strength in other commodities, including crude oil. The 19-market Thomson Reuters CoreCommodity Index was up 0.4 percent after posting its highest level since May. As of 12:51 p.m. CDT (1751 GMT), Chicago Board of Trade November soybeans were up 15 cents at $9.75-1/2 per bushel after reaching $9.78-1/4, the highest since Aug. 10. CBOT December corn was up 3 cents at $3.54-1/2 per bushel and December wheat was up 3/4 cent at $4.44 a bushel. Soybeans rose after the U.S. Department of Agriculture reported export sales of U.S. soybeans in the latest week at 1.6 million tonnes, topping a range of trade expectations for 1.0 million to 1.3 million tonnes. Through its daily reporting system, the USDA also private exporters sold another 198,000 tonnes of U.S. soybeans to China.

"I really like the demand in beans and the soy complex overall. Funds have been short; this might neutralize their positions," said Bill Gentry, a broker at Risk Management Commodities. Dryness in Brazil, the world's top soybean exporter, was also supportive. "Traders are paying attention to the dry conditions in place in Brazil, (which may) delay plantings," consultancy Agritel said in a note. CBOT corn was firm but rangebound as traders awaited yield reports from the U.S. harvest, which is just getting started in the heart of the Midwest. The U.S. corn crop is maturing more slowly than usual, but freeze threats remain low for the next two weeks. Wheat struggled to stay in positive territory after the CBOT December contract reached a one-month high of $4.50-1/2 a bushel. Ample global wheat supplies continue to hang over the market, although dry conditions are threatening yield prospects in parts of Australia, a key exporter. "Notable dryness will continue to lower yield potential in much of New South Wales, Queensland, and western portions of South Australia," MDA Weather Services said in a note to clients.

CBOT prices as of 12:48 p.m. CDT (1748 GMT):

Net Pct Volume Last change change CBOT wheat WZ7 444.00 0.75 0.2 51542 CBOT corn CZ7 354.50 3.00 0.9 79169 CBOT soybeans SX7 975.75 15.25 1.6 110215 CBOT soymeal SMZ7 313.00 7.60 2.5 54000 CBOT soyoil BOZ7 35.06 -0.03 -0.1 45026

NOTE: CBOT September wheat, December corn and November soybeans shown in cents per bushel, December soymeal in dollars per short ton and December soyoil in cents per lb.

(Additional reporting by Naveen Thukral in Singapore and Gus Trompiz in Paris; Editing by Elaine Hardcastle and Dan Grebler)