May 20 Corn closed at $3.315/bushel, down $0.0025 from yesterday's close.  May 20 Wheat closed at $5.55/bushel, down $0.015 from yesterday's close.  May 20 Soybeans closed at $8.5425/bushel, down $0.0925 from yesterday's close.  May 20 Soymeal closed at $288.6/short ton, down $3.9 from yesterday's close.  May 20 Soyoil closed at 26.9 cents/lb down 0.51 cents from yesterday's close.  Jun 20 Live Cattle closed at $81.375/cwt down $3 from yesterday's close.  May 20 Feeder Cattle closed at $114.45/cwt down $4.5 from yesterday's close.  Jun 20 Lean Hogs closed at $44.925/cwt down $3.75 from yesterday's close.  May 20 WTI Crude Oil closed at $22.49/barrel down $0.27 from yesterday's close.  &n...