This European standard specifies a routine method for preparing a sample of a soil improver or a growing media prior to chemical analysis and physical testing. The procedures described herein apply only to those samples that are supplied to the laboratory in the form in which they shall be used for their intended purpose. Note 1: This method is not applicable to liming materials or sewage sludges and is not suitable for materials like rockwool and foam slabs. Note 2: The determination of the laboratory compacted bulk density is given in Annex A.