Terra Industries Inc. together with its subsidiaries (Terra) is a producer and marketer of nitrogen products, serving agricultural and industrial markets. The Company is engaged in the production of anhydrous ammonia (or ammonia), the basic building block of nitrogen fertilizers. Terra converts a portion of the ammonia it produces into urea ammonium nitrate solutions (UAN), ammonium nitrate (AN) and urea. In addition to manufacturing facilities at Port Neal, Iowa; Courtright, Ontario, Canada; Yazoo City, Mississippi; Donaldsonville, Louisiana and Woodward, Oklahoma, the Company owns a 75.3% interest in Terra Nitrogen Company, L.P. (TNCLP), which, through its subsidiary, Terra Nitrogen, Limited Partnership, operates the manufacturing facility at Verdigris, Oklahoma. In addition, the Company owns a 50% interest in Point Lisas Nitrogen Limited (Point Lisas), an ammonia production joint venture in the Republic of Trinidad and Tobago.