X0202 4 2007-08-09 0 0000722079 TERRA INDUSTRIES INC TRA 0001312921 Thompson Paul 600 FOURTH STREET P.O. BOX 6000 SIOUX CITY IA 51102-6000 0 1 0 0 VP Sales & Marketing Common Stock 2007-08-09 4 S 0 2500 18.93 D 118007 D John W. Huey, by Power of Attorney for Paul Thompson 2007-08-13