Terra Nitrogen Company, L.P. (TNCLP) produces nitrogen fertilizer products. The Company�s products are anhydrous ammonia (ammonia) and urea ammonium nitrate solutions (UAN), which are manufactured at the TNCLP�s facility in Verdigris, Oklahoma. TNCLP conducts its operations through a partnership, Terra Nitrogen, Limited Partnership (TNLP). TNCLP�s nitrogen products are used by farmers in crops. The Company�s facility in Verdigris, Oklahoma, has two ammonia plants, two nitric acid plants and two urea ammonium nitrate (UAN) plants. TNCLP is the limited partner of Terra Nitrogen, Limited Partnership (TNLP), owner of the Verdigris, Oklahoma, manufacturing facility and related assets. TNLP is an indirect, wholly owned subsidiary of CF Industries Holdings, Inc. (CF Industries). CF Industries, through its subsidiaries, is engaged in nitrogen and phosphate fertilizer manufacturing and distribution, serving both agricultural and industrial customers.