The U.S. Dollar index continues to strengthen and China's raising lending rates, a combination that continues to put the CME Group grains under pressure.

Early calls for the grains are:

• Corn: 6-8 lower

• Soybeans: 12-15 lower

• Wheat: 9-11 lower

In overnight trading, December 2010 corn futures traded 5 1/4 cents lower to $5.52 per bushel, while November soybeans were 14 cents lower at $11.70, according to Barchart.com. December wheat ended the overnight session 8 1/4 cents lower at $6.81 3/4 per bushel.

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The trip-up is largely due to the continued surge in the U.S. Dollar index, as well as a move by Chinese officials to raise that nation's bank lending rates, which could lead to a pullback in consumption, according to a Dow Jones Newswires report.