Soil Ringtest and QA/QC information

Soil Ringtest programme


Croatian Forest Research Institute

Cvjetno naselje 41

HR-10450 Jastrebarsko



The Soil Ringtest programme is running every third year. The normal schedule is:

  • Informing the possible participating labs via email (end of each even year - e.g. 2018, 2021, 2024, ...)
  • Registration of the participants via internet (April)
  • Distribution of the test samples and the invoice (April)
  • Data submission by the labs (September)
  • Deadline of data submission (beginning of October)
  • Results (October)
  • Re-qualification process finished (May - next year)

The ringtest is financed with a participation fee and ringtest sample preparation from participants.

If you want to participate and you need a labcode or/and a password - please, contact Tamara Jakovljevic.

Webinterface for registration and data submisson

Evaluation procedure

Requalification procedure

Reports from older tests

08th Soil Ringtest 2015

07th Soil Ringtest 2012

06th Soil Ringtest 2009

05th Soil Ringtest 2007

04th Soil Ringtest 2006

03th Soil Ringtest 2003

1st Soil physics ringtest 2010

Additional documents and Excel sheets for soil

Review of possible quality checks and other forms of assistance (Version 1, May 2008)

Excel file with instruction and example of control chart use

Internal Quality Control (Nordtest TR569)

FSCC Soil reference material for method validation

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