CHINA ADDS, CANCELS WHEAT COMMITMENTS - USDA China has added 90,000 tonnes of U.S. wheat to its purchases for delivery in the 1987/88 season and cancelled 30,000 tonnes of wheat purchases for delivery in the 1986/87 season, the U.S. Agriculture Department said. According to the department's Export Sales Report covering transactions in the week ended February 26, China has outstanding wheat commitments for the 1986/87 season of 30,000 tonnes and 420,000 tonnes for delivery in the 1987/88 season. The wheat season begins June 1. China has total corn commitments for 1986/87 of 1,011,200 tonnes and soybeans commitments of 157,500 tonnes. The season for corn and soybeans began September 1.