This U.S. industry comprises establishments primarily engaged in one or more of the following: (1) manufacturing nitrogenous fertilizer materials; (2) manufacturing fertilizers from sewage or animal waste; and (3) manufacturing nitrogenous materials and mixing with other ingredients into fertilizers.

Including:

• Ammonia, anhydrous and aqueous, manufacturing
• Ammonium nitrate manufacturing
• Ammonium sulfate manufacturing
• Anhydrous ammonia manufacturing
• Fertilizers, mixed, made in plants producing nitrogenous fertilizer materials
• Fertilizers, natural organic (except compost), manufacturing
• Fertilizers, of animal waste origin, manufacturing
• Fertilizers, of sewage origin, manufacturing
• Nitric acid manufacturing
• Nitrogenous fertilizer materials manufacturing
• Plant foods, mixed, made in plants producing nitrogenous fertilizer materials
• Urea manufacturing