Agrium Inc. is a leading global producer and marketer of agricultural nutrients and industrial products and a major retail supplier of agricultural products and services in both North America and Argentina. Agrium U.S., the Denver-based subsidiary of the Canadian company is a manufacturer and distributor of fertilizers. The US provides Agrium with more than two-thirds of its sales. The company specializes in nitrogenous fertilizers, which account for not-quite-half of production.