2012Fertilizer and Nitrogen Compound Industry

manufacture of nitrogen, phosphate, or potassium fertilizers, either singly or in combination; urea, natural phosphates, and natural potassium salts; | manufacture of related nitrogen products, such as nitric acid and sulfonitrates, ammonia, ammonium chloride, ammonium carbonate, nitrite, and potassium nitrate. This subclass also includes | manufacture of growing media with peat as the main component; | manufacture of mixed growing media from natural soil, sand, clay, and minerals; | manufacture of plant biostimulants; | manufacture of plant growth promoters; | manufacture of soil amendments; | manufacture of other fertilizers by mixing or chemically treating animal or vegetable materials.