It forecast U.S. corn acreage at 94.389 million, the most since 1944 and above the firm's outlook in November for 94.0 million acres, trade sources said.
The area is well above the U.S. Department of Agriculture's (USDA) corn plantings number of 91.9 million for 2011.
It trimmed its outlook for the 2012 U.S. soybean area to 74.608 million acres from the November outlook for 76.1 million. The USDA said farmers planted 75.0 million acres of soybeans in 2011.
China's State Grain Administration has confirmed it has been stockpiling corn from farmers in northeastern provinces from Dec. 14 to shore up domestic prices and refill depleted reserves.
The stockpiling, which will last until the end of April next year, may halt imports by the world's second-largest consumer during this period after the government bought more than 3 million tonnes of U.S. corn this year to help refill reserves, analysts said.
In Europe, the benchmark March milling wheat contract in Paris rose 1.1 percent to 181 euros, following Chicago's strong lead. Trade was subdued, though, with cash markets closed for the year-end holidays. (Editing by Jane Baird)