Terra Industries Inc., together with its subsidiaries, engages in the production and marketing of nitrogen and methanol products for agricultural and industrial markets in North America and the United Kingdom. The company offers fertilizers, such as anhydrous ammonia, urea ammonium nitrate solutions, ammonium nitrate, and urea, as well as nitric acid, carbon dioxide, and dinitrogen tetroxide. It sells its products to national agricultural retail chains, farm cooperatives, independent dealers, and industrial customers. The company was founded in 1964 and is headquartered in Sioux City, Iowa.