CHICAGO, Feb. 13 (Xinhua) -- Chicago Board of Trade (CBOT) futures were trading mixed Tuesday morning with wheat retreating over technical selling.

As of 1548 GMT, March corn was unchanged 3.67 U.S. dollars per bushel while March wheat was down 1.25 cents at 4.6275 dollars and March soybeans up 5.25 cents at 10.07 dollars per bushel.

Following more than three percent rise in the previous session, CBOT wheat futures retreated in the morning due to technical selling, despite reports of continued drought in the U.S. southern plains.

The U.S. dollar is relatively weak on Tuesday this morning with the Brazilian real priced at 3.29:1, the Argentine peso at 20.0:1, and the Chinese yuan at 6.35:1.

China is the world's top soybean buyer and a weaker dollar will make U.S. products more competitive.

However, as China is preparing for the Lunar New Year, which starts on Friday, the import volume usually turns lower during the holiday.