Soil Ringtest and QA/QC information

Soil Ringtest programme

The Soil Ringtest programme runs every third year. The normal procedure is:

Informing the possible participating labs and NFCs (every third year - e.g. 2021, 2024, 2027, ...)
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)
Re-qualification confirmed (with an extra sample set)

When a lab did not qualify and did not make efforts to improve the data quality, the PCC will send a letter to the respective National Focal Centre informing it that the data may not be used for evaluations at European level.

The ringtest is financed by a participation fee and preparation of ringtest samples by the participants.