GRAINS-Wheat eases after rally, U.S. planting delays support prices

* Wheat dips after climbing to 3-week high on Wednesday

* Adverse weather in U.S. Plains supports prices

* Upside potential in wheat prices limited by ample supplies

(Adds details, quote) SINGAPORE, March 21 (Reuters) - Chicago wheat futures slid on Thursday as the market took a breather after climbing to a three-week high in the last session when prices were underpinned adverse weather. Soybeans rose for a second consecutive session on hopes for progress in U.S. trade talks with China, while corn edged higher after closing largely unchanged in the last session. The most-active wheat contract on the Chicago Board of Trade was down 0.3 percent at $4.63-1/4 a bushel by 0321 GMT, having closed up 1.8 percent on Wednesday when prices marked their highest since Feb. 28 at $4.65 a bushel. Soybeans added 0.1 percent to $9.06-1/2 a bushel and corn gained 0.1 percent to $3.71-3/4 a bushel. "There is some support for the wheat market as we are witnessing adverse weather in parts of the U.S. grain belt," said Phin Ziebell, an agribusiness economist at National Australia Bank. "Although I am not sure a sustained rally is possible based on limited weather concerns." Heavy snows and the anticipation of floods in the U.S. northern Plains spring wheat belt, particularly in top producer North Dakota, have raised the risk of delays in planting the 2019 crop. Seeding normally begins in April. Brazil, one of the world's largest wheat importers, is expected to buy less of the cereal in the new season that starts in August because of a favorable outlook for local production, broker and analyst INTL FCStone said on Wednesday. Soybean prices firmed on technical buying and hopes for progress in U.S. trade talks with China, the world's top importer of the oilseed. However, U.S. President Donald Trump warned on Wednesday that the United States may leave tariffs on Chinese goods for a "substantial period" to ensure that Beijing complies with any trade agreement. Commodity funds were net buyers of CBOT wheat, soybeans and soymeal futures contracts on Wednesday and net sellers of corn and soyoil contracts.

Grains prices at 0321 GMT

Contract Last Change Pct chg Two-day chg MA 30 RSI CBOT wheat 463.25 -1.50 -0.32% +1.42% 477.43 57 CBOT corn 371.75 0.25 +0.07% +0.07% 376.05 64 CBOT soy 906.50 0.50 +0.06% +0.08% 913.52 60 CBOT rice 10.96 $0.02 +0.14% +2.24% $10.57 78 WTI crude 60.15 -$0.08 -0.13% +1.79% $56.21

Currencies

Euro/dlr $1.142 $0.009 +0.77% +0.87% USD/AUD 0.7155 0.005 +0.75% +0.96%

Most active contracts Wheat, corn and soy US cents/bushel. Rice: USD per hundredweight RSI 14, exponential

(Reporting by Naveen Thukral; Editing by Subhranshu Sahu)