Soybeans rose for a second consecutive session on hopes for progress in U.S. trade talks with China, while corn edged lower 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 $4.63-1/2 a bushel by 0629 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 $9.06-3/4 a bushel, while corn lost 0.1 percent to $3.71-1/4 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.
On the technical front, CBOT May wheat may gain more to $4.70-1/4 per bushel, as it has broken a resistance at $4.63.
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 favourable 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.