Report - ICP Forests

3. Intensive Monitoring 59
3.3.3.2 Spatial trends for the BC/Al ratio and pH 2003 – 2006
At 40.2% of all evaluated 396 soil solution samplers the tree species specific critical limit was
exceeded in 5% or more of all measurements. For 183 samplers corresponding to 46.2% the
samples, critical limit was exceeded in none of the cases. For 40.2% of the samplers the critical
limit was exceeded in more than 5% of the mesurements. For 3.8% of the samplers the
measured BC/Al ratio permanently exceeded the critical limit (more than 95% of all
measurements). The number and percentage of samplers with different percentages of
exceedances is given in Table 3.3.3.2-1.
Table 3.3.3.2-1: Percentage of critical limit exceedances; n=396 samplers in different soil depths.
Percentage of
exceedance N (sampler) % (sampler) Cumulated %
> 95% 15 3.8 3.8
> 75 and 50 and 25 and 5 and 0 and