Chicago Board of Trade (CBOT) agricultural futures settled mixed on Monday amid trade uncertainties and lack of exports data as a result of partial U.S. government shutdown.

The U.S. Department of Agriculture (USDA) has not released any new exports reports since the federal government shutdown started on Dec. 22, 2018.

Optimism over the trade talks between the United State and China did support the U.S. soybeans to some degree, but the oil seed prices failed to hold on as traders learned from other sources that export volume declined sharply in December, even after Chinese importers resumed buying from the United States.

CBOT wheat followed soybeans' decline amid fears of weak demand.

"The exports are really slow for the wheat and when the government reopens, we are expected to see that there isn't going to be much on the horizon as well," said Virginia McGathey, McGathey Commodities.

At the end of the session, CBOT March corn was up 0.25 cent, or 0.07 percent to close at 3.785 dollars per bushel. March wheat was down 5.25 cents, or 1.01 percent to settle at 5.1425 dollars. March soybeans were down 6.75 cents, or 0.74 percent to settle at 9.035 dollars per bushel.