CBOT农产品期货主力合约收盘全线上涨，玉米期货涨2.17%

Group 1 - The core viewpoint of the article highlights the upward trend in agricultural futures at the Chicago Board of Trade (CBOT) on August 21, with all major contracts closing higher [1] Group 2 - Soybean futures increased by 1.83%, closing at 1055.00 cents per bushel [1] - Corn futures rose by 2.17%, ending at 412.75 cents per bushel [1] - Wheat futures saw a smaller increase of 0.33%, closing at 530.00 cents per bushel [1]