Corn and wheat, which like soybeans hit multi-week lows on Wednesday, extended a bounce, with help from a weaker dollar and signs of fresh demand from wheat importers. The most-active soybean contract on the Chicago Board of Trade (CBOT) was unchanged on the day at $10.13 a bushel by 0939 GMT. "Nothing has changed other than the promise of soybeans being on the agenda," he said. Ignoring the U.S., China has ramped up soybean purchases from South America, including a large volume of Argentine soybeans last week during a brief export tax waiver. CBOT corn was up 0.4% at $4.18-1/4 a bushel and CBOT wheat added 0.2% to $5.10-1/4 a bushel.