THE OPEN: November beans:  12 lower December meal:    4.20 lower December soyoil:   20 lower December corn:     8 lower September wheat:  3 3/4 lower The markets opened weaker than expected as more follow-through selling took place following Monday's disappointing day of trade.   Trends featured a bounce in oilshare, with meal triggering sell-stops on the way down as more shorts elected to cover in some of their soyoil position.  Selling continued throughout the day as demand bears once again faced off against new crop supply bulls.   Spreads were also weaker as prices worked lower.  No doubt that the rains crossing the Dakotas, Nebraska, Iowa, Illinois and Mi...