Terrestrial Microorganisms

  • To test the effects of your chemicals on soil microorganisms, Fera offers a number of ecotoxicology services. Tests can be carried out to assess the impact of your chemicals on earthworms and on the soil microbial community.
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Terrestrial Microorganisms

Our scientists have extensive experience in conducting studies on microorganisms in the soil. All studies are carried out in line with current international guidelines and guidance documents, and we can adapt our services to provide bespoke tests that meet your specific data requirements.


Our services
  • Test the impact of chemicals on soil microorganisms
  • Earthworm toxicity and nitrogen transformation tests
  • Tests adapted to meet your data requirements
  • Studies conducted to international guidelines e.g. OECD, EPA

Ecotoxicology services: Terrestrial Microorganisms


You can choose from the following soil organism tests:

OECD 207

Earthworm acute toxicity test

This test evaluates the acute toxicity of your chemical on earthworms. Earthworms are exposed to treated soil in a range of concentrations to assess the effects upon mortality and weight.

OECD 222

Earthworm reproduction test

This test assesses the effects of your chemical in the soil on the reproductive output of earthworms. Adult worms are exposed to a range of concentrations of the test substance, and their behaviours and morphology observed over a set period. The number of juveniles hatched is also measured. The reproductive output of the test worms is compared to that of a control group.

OECD 216

Nitrogen transformation test

This test investigates the long-term effects of chemicals, after a single exposure, on the nitrogen transformation activity of soil microorganisms. Soil is mixed with your product and samples are taken at intervals throughout the test period. The nitrate transformation rate is determined, and compared with untreated control samples.

OECD 226

Predatory mite reproduction test

This test assesses the effects of your chemical in the soil on the reproductive output of soil mites. Adult female mites are exposed to a range of concentrations of test substance for a set period. The numbers of surviving adults and juveniles is determined. The reproductive output of the test mites is compared to that of a control group.

OECD 232

Collembolan reproduction test

This test assesses the effects of your chemical in the soil on the reproductive output of collembolans. Adult collembola are exposed to a range of concentrations of test substance for a set period. The numbers of surviving adults and juveniles is determined. The reproductive output of the test mites is compared to that of a control group.

For more information about any of our tests, please get in touch.


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