December corn opened 1/2 cent lower on the day at 599 1/2 and established an early range of 589 1/2 to 600. The corn market opened much stronger than the early indications this morning, but came under selling pressure that have kept the market lower into mid session. The opening strength was thought to stem from a rally in crude oil and an easing of the dollar prior to the open. It also stemmed from weather forecasts in the US that are much drier than was thought late yesterday and this dryness in the Midwest is expected to stretch well into next week. Traders say that today's weather is not providing as much support in corn as it is in soybeans since corn has passed its most sensitive development stage while soybeans are still setting pods. Basis levels for corn are mostly steady to firm in the interior this morning.