scope:

Specifies a gravimetric method, by drying under reduced pressure, for the determination of the moisture content of fertilizers and liming materials. The method is not applicable to fertilizers and liming materials containing the following - calcium nitrate; - calcium hydroxide; - calcium sulfate containing less than two molecules of water of crystallization for each molecule of calcium sulfate; - magnesium sulfate containing one to seven molecules of water of crystallization for eacht molecule of magnesium sulfate; - salts which effloresce readily at ambient temperatures or those which absorb water (desiccants).