CBOT wheat futures rose to a one-week high, heading for a third session of gains in four, with prices underpinned by concerns over dry weather hurting the U.S. winter crop. Corn slid for a third consecutive session, while soybeans ticked higher after closing marginally lower on Friday with improved South American weather weighing on prices. There are concerns about U.S. hard red winter wheat but it is speculative at the moment. We have to wait and see how the crop shapes up.