THE OPEN March beans: 7 lower March meal:  1.70 lower March soyoil:  27 lower March corn:  1 1/4 higher March wheat:  1 1/2 lower The markets opened as called with spread trade dominant, as traders unwound previous buy wheat and beans/sell corn.   The net short in corn and the prospect of corn turning more competitive (and China maybe purchasing some?), put the squeeze to the corn bear.   Soyoil futures sold off vs. meal but the soy complex remained weak in general.   Ahead of the deal signing on Wed., the US Treasury announced it would drop its designation of China as a "currency manipulator".  At 10:00 export inspections were released as follows: Beans:  1,136,304 mt vs...