Acidification, soil horizons, fuzzy cluster analysis, RGB maps, degree of damage.

Long-term acidification and nutrient degradation of forest soils is proving to be the major factor that will limit forest management in the near future. We analyse three soil horizons in each square. The goal of the work is to determine the degree of damage to soil horizons by fuzzy cluster analysis. From these analyses we are constructing RGB maps that would show areas with the same or similar damage of soil horizons in the whole country and we are also trying to determine the degree of soil damage. The result is a 1x1 square km which forms a mixture of RGB colors according to the degree of membership to the cluster. We search for the areas which have the same composition or the same soil damage throughout the country.