This part of GB/T 13566 specifies the method for the determination of the bulk density of solid fertilizers. This section is only applicable to dry fertilizers. If the fertilizer has absorbed moisture during transportation and storage, it must be dried in an environmental test room with constant low humidity before measurement. This section does not apply to powdered chemical fertilizers, nor does it apply to fertilizers containing a large number of particles with a particle size greater than 5mm.
GB/T 13566.1-2008 Referenced Document
ISO 7742:1988 Solid fertilizers; reduction of samples
ISO 8358:1991 Solid fertilizers; preparation of samples for chemical and physical analysis
GB/T 13566.1-2008 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