# Commission Regulation (EC) No 1737/2006 of 7 November 2006 laying down detailed rules for the implementation of Regulation (EC) No 2152/2003 of the European Parliament and of the Council concerning monitoring of forests and environmental interactions in the Community, Division III.1: Assessment within the Level II plots

Extent: E+W+S+N.I.

The assessment for visible ozone injury on main tree species within the Intensive Monitoring Plot (IMP) shall be conducted at least on the branches from the same 5 individual trees where foliar sampling for chemical analysis is carried out.
The samples for foliar injury should be collected every second year from the upper sun exposed crown.
An annual assessment is preferred but optional.

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Source: https://www.legislation.gov.uk/eur/2006/1737/annex/I/chapter/11/division/III/division/III.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2006-1737/annex-I/chapter-11/division-III/division-III.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.