Chicago wheat futures dipped slightly but remained near a one-week high due to concerns over disruptions to Black Sea supplies amid the escalating war in Ukraine. The most-active wheat contract on the Chicago Board of Trade decreased by 0.66% to $5.64 a bushel. Ukraine's wheat harvest is expected to increase next year thanks to a larger sowing area. The soybean contract was down 0.45% amid expectations of a bumper crop in Brazil, while corn slipped 0.12%.