December corn opened 10 3/4 cents lower on the day at 562 and established an early range of 561 1/2 to 589. Traders indicate that the lower open came on follow-through weakness from the overnight session, but this met with immediate buying from locals, commission houses and funds. Prices moved higher into mid session with corn generally gaining on wheat. Traders said that a moderate sell off in the dollar also supported prices in the early going. Weather was a minor factor in corn on the open according to floor traders with some private forecasters indicating that yield and crop conditions in the Midwest are better than indicated on last week's USDA S&D Report. Other reports have indicated poor kernel development at the end of ears of corn in some areas. Traders say that South Korea is in the market for more feed corn and meal after sitting on the sidelines in export markets during much of the summer. Basis levels at the Gulf are unchanged this morning with light farmer selling contributing to tight supplies there. Lower water levels on the Upper Mississippi are resulting in traffic being restricted to one-way in some location while channels are dredged.