This standard specifies the methods for the determination of loose bulk density and compact bulk density of solid fertilizers. This standard applies to dry fertilizers. If the fertilizer has absorbed moisture during transportation and storage, it must be dried before measurement. This standard does not apply to powdered fertilizers. This standard also does not apply to fertilizers containing a large number of particles with a particle size greater than 5mm.
GB/T 13566-1992 history
2008GB/T 13566.1-2008 Fertilizers.Determination of bulk density.Part 1:Loose density
1992GB/T 13566-1992 Determination of bulk density for fertilizers