The WTO has ruled that China has incorrectly applied tariff-rate quotas on imports of corn, rice and wheat in a case brought by the U.S. A forthcoming trade deal between the U.S. and China could address that with a purchasing commitment from China, which imported $3.29 billion of the three grains in 2018. U.S. exports to China were just $133 million in the 12 months to Feb. 28 and have been zero since July. Total U.S. exports of the three grains reached $19.6 billion in the past 12 months, indicating room for a significant increase in sales to China. Those reached $2.24 billion at the...