Division II.2 Selection of sample trees on Level II plots

All pre-dominant, dominant and co-dominant trees corresponding to the Kraft tree classes 1, 2, and 3 respectively, in the total plot are to be monitored. In the case that the plot has many trees (e.g. dense stands), the number of sample trees for the crown assessment can be reduced by using a sub-plot. In the case of a sub-plot all the pre-dominant, dominant and co-dominant trees corresponding to the Kraft tree classes 1, 2, and 3 respectively, in the sub-plot are to be monitored. In certain cases it can be allowed that a different, but objective and unbiased system is used to reduce or to select the number of trees to be sampled. The same methods shall be applied every year and a minimum of 20 trees shall be assessed each survey.