CBOT农产品期货主力合约收盘全线下跌，小麦期货跌0.62%

Group 1 - The core viewpoint of the article indicates a decline in agricultural futures at the Chicago Board of Trade (CBOT) on September 18, with all major contracts closing lower [1][2] Group 2 - Soybean futures fell by 0.48%, closing at 1038.75 cents per bushel [1] - Corn futures decreased by 0.53%, ending at 424.50 cents per bushel [1] - Wheat futures dropped by 0.62%, closing at 525.00 cents per bushel [1]