# 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 and analysis

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

Litterfall assessment distinguishes between mandatory and optional parameters (See list below).
LIST OF PARAMETERS
Mandatory
Optional
Ca, K, Mg, C, N, P, S
Na, Zn, Mn, Fe, Cu, Pb, Al, B
For chemical analysis the litterfall samples are dried to constant weight in an oven at maximum 80 °C, preferably at 65 °C. After this drying, the mass of 100 leaves or 1 000 needles is determined at 105 °C. Knowing the percentage of moisture in the sub samples, the whole amount of each fraction can be converted to dried mass at 80 °C. The samples dried at max 80 °C are grounded to a homogeneous powder. The chemical analysis of litter is similar to the foliar chemical analysis. The results of litterfall chemical analysis are reported to 80 °C just like the litterfall mass.

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Source: https://www.legislation.gov.uk/eur/2006/1737/annex/I/chapter/9/division/II/division/II.4 (the official version)
Page: https://openlegislation.uk/eu-regulation-2006-1737/annex-I/chapter-9/division-II/division-II.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.