May 20 Corn closed at $3.3475/bushel, down $0.06 from yesterday's close.  May 20 Wheat closed at $5.5025/bushel, down $0.185 from yesterday's close.  May 20 Soybeans closed at $8.6275/bushel, down $0.2325 from yesterday's close.  May 20 Soymeal closed at $314.9/short ton, down $6.6 from yesterday's close.  May 20 Soyoil closed at 26.05 cents/lb down 0.96 cents from yesterday's close.  Jun 20 Live Cattle closed at $87.575/cwt down $4.5 from yesterday's close.  May 20 Feeder Cattle closed at $118.4/cwt down $4.5 from yesterday's close.  Jun 20 Lean Hogs closed at $57.325/cwt down $3 from yesterday's close.  May 20 WTI Crude Oil closed at $20.96/barrel up $0.48 from yesterday's close.  &nbs...