DURING A CARGO FLIGHT, THE AIRPLANE ENCOUNTERED STRONG HEAD WINDS AND ICING CONDITIONS. THE PILOT STATED THAT HE HAD TO APPLY ADDITIONAL POWER IN ORDER TO MAINTAIN ALTITUDE. DURING THE DESCENT TO THE AIRPORT, THE PILOT NOTIFIED ATC THAT HE WAS DECLARING AN EMERGENCY AND REPORTED MINIMUM FUEL. SHORTLY THERE AFTER, THE ENGINES QUIT. THE PILOT INITIATED A FORCED LANDING IN A FIELD WHERE DURING THE LANDING ROLL, THE LEFT MAIN GEAR COLAPSED. POST CRASH INSPECTION OF THE AIRPLANE REVEALED THAT THE FUEL TANKS WERE NEAR EXHAUSTED OF FUEL.