Corn increased on Monday rising towards the strongest level in more than a seven-day period after a government data predict harvest in the U.S., the world's largest exporter and grower, gain less than initially expected. December corn futures jumped 0.9% to $4.3075 a bushel on the CBOT, the most since October 31, while the prices were at $4.29 as of 10:57 a.m. Singapore time.