THE OPEN May beans:  8 1/2 lower May meal:  2.50 lower May soyoil:  4 lower May corn:  1 lower May wheat;  1 lower The markets opened on a mixed note but grains were higher on short-covering in wheat and new buying in corn.  The wet and soggy start for March put the market on edge as farmers try to get corn into the ground.  Corn gained on wheat and beans.  Oilshare found profit-taking, as soyoil futures entered into extreme overbought conditions.  A good rally was noted at midday as prices could continue to find support into the March 31 report.  Allendale released their latest acreage forecasts ahead of the March 31 Planting Intentions: beans:  90.0 mln acres c...