German association of agricultural testing and research institutes whose specialist groups run interlaboratory tests for soils, growing media, fertilisers, feed, seed and milk, including an EU fertiliser ring test open to laboratories worldwide and an annual feed survey.
VDLUFA EU Düngemittel-Ringtest (EU Fertiliser Ring Test)
VDLUFA Futtermittel-Enquete (feed survey)
Ringversuch Mykotoxine (mycotoxins in feed)
Ringversuche Bodenuntersuchung (soil analysis)
Ringversuch Gärtnerische Kultursubstrate (horticultural growing media)
| Scheme | Testing fields | Sample type | Analytes | Rounds/yr | Link |
|---|---|---|---|---|---|
| VDLUFA EU Düngemittel-Ringtest (EU Fertiliser Ring Test) |
| Fertilisers | Nutrient and contaminant contents | 1 | Scheme page for VDLUFA EU Düngemittel-Ringtest (EU Fertiliser Ring Test) (opens in a new tab) |
| VDLUFA Futtermittel-Enquete (feed survey) |
| Feed (3 samples) | — | 1 | Scheme page for VDLUFA Futtermittel-Enquete (feed survey) (opens in a new tab) |
| Ringversuch Mykotoxine (mycotoxins in feed) |
| Feed | Mycotoxins | — | Scheme page for Ringversuch Mykotoxine (mycotoxins in feed) (opens in a new tab) |
| Ringversuche Bodenuntersuchung (soil analysis) |
| Soil | — | 1 | Scheme page for Ringversuche Bodenuntersuchung (soil analysis) (opens in a new tab) |
| Ringversuch Gärtnerische Kultursubstrate (horticultural growing media) |
| Growing media | — | 1 | Scheme page for Ringversuch Gärtnerische Kultursubstrate (horticultural growing media) (opens in a new tab) |
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Compiled from VDLUFA (Verband Deutscher Landwirtschaftlicher Untersuchungs- und Forschungsanstalten e.V.)'s own published information or sent in by the provider, and reviewed by EqasOnline. Check scheme details, fees and dates with the provider before you enrol. 5 schemes listed here.
Last updated 1 Nov 2026.
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Other providers listing schemes in the same testing fields, those in Germany first.
Kempten, Germany
Schemes: Food and feed – chemical-physical testing (Dairy, animal products, beverages, fruit and vegetables, cereals, fats and oils, cocoa, infant formula, animal feed)Food and feed – immunological, molecular biological and microbiological testingFood and feed – organoleptic (sensory) testing
6 schemes
Accreditation self-declared (DAkkS)Berlin, GermanyInternational participants
Schemes: BAM-Ringversuch Altlasten (contaminated sites) (Contaminated soils or sediments)BAM-Ringversuch zur Altholzanalytik (waste wood) (Wood)CEQAT-DGHS interlaboratory comparisons (physical hazards of dangerous goods and hazardous substances)
3 schemes
Stuttgart, Germany
Schemes: Ringversuche Trinkwasser – A 1 Anionen (Drinking water)Ringversuche Trinkwasser – O 2 LHKW/Benzol (Drinking water)Ringversuche Trinkwasser (A 1–A 5 anorganische, O 1–O 5 organische Parameter) (Drinking water)
5 schemes
Accreditation self-declared (DAkkS)Oering, GermanyInternational participants
Schemes: DLA ptAL07 Allergens VII (cashew, coconut, fish, molluscs in noodle soup powder) (Noodle soup powder)DLA ptAL08 Allergens VIIIDLA ptAL09 Allergens IX
10 schemes
Accreditation self-declared (DAkkS)Hamburg, Germany
Schemes: Trinkwasser-Ringversuche chemische Analytik (with AQS Baden-Württemberg) (Drinking water)26/1 TW/LÜRV S12 Organochlor-Insektizide in gering belastetem Wasser (Surface, ground and drinking water)
2 schemes
Recklinghausen, Germany
Schemes: Trinkwasser-Ringversuche (drinking water, chemical parameters) (Drinking water)Mikrobiologische Ringversuche (Legionella and colony count in cooling water) (Cooling water)Länderübergreifende Wasser-Ringversuche (LÜRV) (Wastewater and other aqueous media)
4 schemes
Accreditation self-declared (DAkkS)