Manufacture of fertilisers and nitrogen compounds

This sub-class includes the manufacture of fertilisers and/or nitrogen compounds. Units in this sub-class include the manufacture of: - fertilisers: straight or complex nitrogenous, phosphatic or potassic fertilisers, urea, crude natural phosphates and/or crude natural potassium salts - associated nitrogen products: nitric and/or sulphonitric acids, ammonium chloride, ammonium carbonate, nitrites and/or nitrates of potassium. - potting soil with peat as main constituent and/or mixtures of natural soil, sand, clays and minerals - other fertilisers by the mixing or chemical treatment of animal or vegetable products - biological crop additives - plant bio-stimulants, bio-fertilisers and plant growth promoters - soil improvers