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K.C. hard red winter wheat and MGEX spring wheat also closed in negative territory, but the declines were limited by relatively tight supplies of high-protein wheat.
Traders said a large short position by funds kept the declines in wheat in check.
The US Department of Agriculture said the US winter wheat crop was 72 percent planted, near the five-year average of 73 percent but behind an average of trade expectations for 75 percent.