Chicago wheat futures jumped on Tuesday as hopes faded for a U.S. diplomatic effort to end the war in Ukraine, which has disrupted Black Sea grain shipments, analysts and traders said.Corn and soybean futures chopped up and down as traders adjusted positions ahead of Friday's U.S.<p><p>https://www.marinelink.com/news/wheat-prices-rise-us-diplomatic-attempts-542811</p></p>