Chicago Board of Trade (CBOT) grains futures closed mixed on Monday as bargain-buying boosted the prices of corn and wheat.

The most active corn contract for December delivery rose 1.5 cents, or 0.4 percent, to 3.7625 dollars per bushel. September wheat delivery went up 1.75 cents, or 0.4 percent to 4.41 dollars per bushel. November soybeans fell 6.75 cents,or 0.71 percent, to 9.3825 dollars per bushel.

Last Thursday, the U.S. Department of Agriculture (USDA) crop forecast turned out to be well above average trade estimates, which led to sharp declines in futures prices.

Thanks to bargain-buying during Monday's session, the prices of corn and wheat futures bounced moderately. However, the rises were limited as the U.S. dollar rallied amid eased tensions between Washington and Pyongyang.

Traders are also watching moderate rainfall move across agricultural State of Iowa. The near term forecast also includes net boosts in soil moisture for much of the western Corn Belt, which is too late to materially affect corn yield potential, but is no doubt viewed as timely for soybeans.

The weather pattern put more pressures on soybeans, which suffered further losses on Monday.