May 20 Corn closed at $3.4125/bushel, down $0.0475 from yesterday's close.  May 20 Wheat closed at $5.695/bushel, down $0.0175 from yesterday's close.  May 20 Soybeans closed at $8.8225/bushel, up $0.0075 from yesterday's close.  May 20 Soymeal closed at $325.5/short ton, up $2.4 from yesterday's close.  May 20 Soyoil closed at 26.87 cents/lb up 0.02 cents from yesterday's close.  Jun 20 Live Cattle closed at $89.075/cwt down $0.35 from yesterday's close.  May 20 Feeder Cattle closed at $120.9/cwt down $0.025 from yesterday's close.  Jun 20 Lean Hogs closed at $59.775/cwt down $4.475 from yesterday's close.  May 20 WTI Crude Oil closed at $20.25/barrel down $1.26 from yesterday's close. ...