May 20 Corn closed at $3.335/bushel, down $0.0125 from yesterday's close.  May 20 Wheat closed at $5.4175/bushel, down $0.085 from yesterday's close.  May 20 Soybeans closed at $8.5875/bushel, down $0.04 from yesterday's close.  May 20 Soymeal closed at $309.1/short ton, down $5.8 from yesterday's close.  May 20 Soyoil closed at 26.24 cents/lb up 0.19 cents from yesterday's close.  Jun 20 Live Cattle closed at $83.075/cwt down $4.5 from yesterday's close.  May 20 Feeder Cattle closed at $111.65/cwt down $6.75 from yesterday's close.  Jun 20 Lean Hogs closed at $52.825/cwt down $4.5 from yesterday's close.  May 20 WTI Crude Oil closed at $24.72/barrel up $4.41 from yesterday's close.  &nb...