# 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.3: Frequency of sampling

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

Litterfall shall be collected at least monthly and even bi-weekly in periods of heavy litterfall. The samples may be pooled to periodic samples for chemical analyses. In regions with snow and frost in wintertime and in remote areas it may be necessary to let the traps stay over winter in the forest. Litterfall may then be collected once before the winter period and once after snowmelt, as frost limits drainage and litter decomposition.

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Source: https://www.legislation.gov.uk/eur/2006/1737/annex/I/chapter/9/division/II/division/II.3 (the official version)
Page: https://openlegislation.uk/eu-regulation-2006-1737/annex-I/chapter-9/division-II/division-II.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.