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Corn futures also turned higher on the weak dollar, but gains were limited by concerns about dry weather limiting the size of the harvest in South America. At 11:45 a.m. CST (1645 GMT), CBOT January soybeans were up 10-1/2 cents at $11.55 a bushel. CBOT March corn was up 6-1/4 cents at $6.13-1/4 a bushel.