This class includes:
——manufacture of fertilizers: straight or complex nitrogenous, phosphatic or potassic fertilizers; urea, crude natural phosphates and crude natural potassium salts
——manufacture of associated nitrogen products: nitric and sulphonitric acids, ammonia, ammonium chloride, ammonium carbonate, nitrites and nitrates of potassium

This class also includes:
——manufacture of potting soil with peat as main constituent
——manufacture of potting soil mixtures of natural soil, sand, clays and minerals

This class excludes:
——mining of guano, see 0891
——manufacture of agrochemical products, such as pesticides, see 2021
——operation of compost dumps, see 3821