THE OPEN July beans:  1 lower July meal:   .80 lower July  soyoil:  14 lower July corn:  5 lower July wheat:  15 lower  Prices opened as expected with more selling in wheat futures and oilshare.  Better weekend weather and a very important May 12 USDA report are the major catalysts for a liquidation day of trade.  The cancellation of corn seemed to overshadow the new crop sale, while wheat values traded lower.   Spreads were firmer with the corn and bean inverses strengthening.  Today and tomorrow may continue to be about position - squaring in front of the USDA report Wed, to be released at 11:00 central time. At 10:00 export inspections were released as follows: corn...