Terra Nitrogen Company, L.P., through its subsidiary, Terra Nitrogen, Limited Partnership, engages in the production and distribution of nitrogen fertilizer products to agricultural and industrial markets. The company’s products include anhydrous ammonia, a form of nitrogen fertilizer and the feedstock for the production of other nitrogen fertilizers; and urea ammonium nitrate, a liquid fertilizer. It sells its products primarily in the Central and Southern Plains and the Corn Belt regions of the United States. The company’s customers include dealers, national farm retail chains, distributors, and other fertilizer producers and traders. Terra Nitrogen GP, Inc. serves as the general partner of the company. The company was founded in 1991 and is based in Sioux City, Iowa. Terra Nitrogen Company, L.P. is a subsidiary of Terra Nitrogen Corporation