Abstract
Pull-out resistance of root system, as a total force concerning to slope stability and tight binding power of soil, among major planted species in post-fire stands for erosion control projects by Hiroshima prefectural government, were evaluated. The species differences of relationships between root diameters and maximum pull-out resistance loads were confirmed especially in larger diameter degrees and could be approximated by exponential curves. The differences were also assessed by distribution of estimated pull-out resistance of sample trees. From basis for these comparative differences among species, planting methods should be adopted in the projects, in consideration of the future target of forest types and succession process.
