# 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 II.4: Parameters to be measured

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

Mandatory parameters
Optional parameters
Periodic measurements
Tree species
Bark
Diameter at breast height (DBH)
Tree height (on all trees)
Tree height
Crown height (on all trees)
Height to crown base on a sub-sample of trees in the plot
Crown width
Information on management operations
Volume estimates
Tree ring analysis
Ring width
History of the tree diameter under bark in five years intervals
Basal area and volume estimates

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Source: https://www.legislation.gov.uk/eur/2006/1737/annex/I/chapter/4/division/II/division/II.4 (the official version)
Page: https://openlegislation.uk/eu-regulation-2006-1737/annex-I/chapter-4/division-II/division-II.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.