This International Standard specifies a rapid method for the determination of the potential rate of ammonium
oxidation and inhibition of nitrification in soils. This method is suitable for all soils containing a population of
nitrifying microorganisms. It can be used as a rapid screening test for monitoring soil quality and quality of
wastes, and is suitable for testing the effects of cultivation methods, chemical substances [except volatiles,
i.e. H 1 (Henry’s constant)], extracts of biosolids and pollution in soils.