{
  "url": "https://openlegislation.uk/eu-regulation-2009-761/annex-IV/division-2/division-2.2/division-2.2.2",
  "json_url": "https://openlegislation.uk/eu-regulation-2009-761/annex-IV/division-2/division-2.2/division-2.2.2.json",
  "legislation": "eur/2009/761",
  "legislation_title": "Commission Regulation (EC) No 761/2009 of 23 July 2009 amending, for the purpose of its adaptation to technical progress, Regulation (EC) No 440/2008 laying down test methods pursuant to Regulation (EC) No 1907/2006 of the European Parliament and of the Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2009-761",
  "path": "annex/IV/division/2/division/2.2/division/2.2.2",
  "kind": "division",
  "number": "2.2.2",
  "heading": "Yield",
  "text": "The yield is calculated as the biomass at the end of the test minus the starting biomass for each single vessel of controls and treatments. For each test concentration and control, calculate a mean value for the yield along with variance estimates. The percentage inhibition in yield (%Iy) may be calculated for each treatment replicate as follows:\n% I y = Y C – Y T Y C × 100\nwhere:\n%Iy: percentage inhibition of yield;\nYC: mean value for yield in the control group;\nYT: value for yield for the treatment replicate.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2009/761/annex/IV/division/2/division/2.2/division/2.2.2",
    "retrieved_at": "2026-11-01T14:51:19.625001+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}