CBOT农产品期货主力合约收盘多数上涨，大豆期货跌0.55%

Group 1 - The core viewpoint of the article highlights the performance of agricultural futures at the Chicago Board of Trade (CBOT) on July 31, with most contracts showing an upward trend [1] Group 2 - Soybean futures decreased by 0.55%, closing at 990.25 cents per bushel [1] - Corn futures increased by 0.36%, closing at 413.75 cents per bushel [1] - Wheat futures saw a slight increase of 0.05%, closing at 524.00 cents per bushel [1]