This industry comprises establishments primarily engaged in manufacturing nitrogenous or phosphoric fertilizer materials and mixing these ingredients into fertilizers; and in purchasing ingredients and mixing them into fertilizers. Establishments engaged in the manufacture of phosphoric acid, urea, ammonia and nitric acid, whether or not for use as a fertilizer material, are included.

This industry comprises establishments primarily engaged in manufacturing agricultural chemicals, except fertilizers. Establishments engaged in manufacturing household pest control products are included.