The CBOT pulled back again on Tuesday with only soyoil and the livestock contracts finding their way to higher ground. Funds continued to liquidate their net long positions in corn and soybeans while extending a short SRW wheat position. Fundamental news that hit the wires Tuesday seemed to all be bearish the U.S. grain markets, with additional troubles in the Mississippi River, no daily export sales announcements, and favorable progress in negotiations over the Ukraine export corridor. Additionally, rains are slated for Argentina and Brazil this week, which will aid crop development in those countries. This is the time of year when grain markets see seasonal pressure as the harvest bolsters new crop supplies, and the current export trouble...