Dec 20 Corn closed at $3.2075/bushel, down $0.03 from yesterday's close.  Sep 20 Wheat closed at $4.955/bushel, down $0.0575 from yesterday's close.  Nov 20 Soybeans closed at $8.675/bushel, down $0.105 from yesterday's close.  Dec 20 Soymeal closed at $286.8/short ton, down $1.6 from yesterday's close.  Dec 20 Soyoil closed at 30.75 cents/lb down 0.53 cents from yesterday's close.  Oct 20 Live Cattle closed at $106.45/cwt down $0.525 from yesterday's close.  Sep 20 Feeder Cattle closed at $145.125/cwt down $0.75 from yesterday's close.  Oct 20 Lean Hogs closed at $50.975/cwt up $1.775 from yesterday's close.  Sep 20 WTI Crude Oil closed at $41.5/barrel down $0.45 from yesterday's close. ...