Division II.2 Siting and number of litterfall traps

Litterfall traps shall be set up in a design enabling comparisons with deposition and soil water results. The traps are fixed and may be placed randomly or systematically e.g. at regular intervals and in a sufficient number to represent the whole plot and not only the dominant tree species

Litterfall traps should be distributed all over the plot area. Litterfall shall be sampled from at least 10 collectors per plot and even up to 20 collectors depending on plot size and tree species involved in the assessment.

The countries are free to select the type of traps for the monitoring of litterfall.