Mar 23 Corn closed at $6.7075/bushel, down $0.0775 from yesterday's close.  Mar 23 Wheat closed at $7.5725/bushel, down $0.075 from yesterday's close.  Mar 23 Soybeans closed at $15.1925/bushel, down $0.005 from yesterday's close.  Mar 23 Soymeal closed at $495.5/short ton, up $13.6 from yesterday's close.  Mar 23 Soyoil closed at 59.04 cents/lb down 1.54 cents from yesterday's close.  Apr 23 Live Cattle closed at $163.625/cwt down $0.075 from yesterday's close.  Mar 23 Feeder Cattle closed at $186.825/cwt up $0.375 from yesterday's close.  Apr 23 Lean Hogs closed at $83.325/cwt down $0.75 from yesterday's close.  Mar 23 WTI Crude Oil closed at $77.64/barrel down $0.83 from yesterday's close.&...