The purpose of this study is to clarify the correlation forest vegetation and soil on two type environments (sediment deposit and colluvial slope) at small Sabo-dam in Mts. Rokko, Hyogo Prefecture, Japan. These forest were dominated by Salix sieboldiana, Alnus sieboldiana etc., and had different species composition compared with neighborhood secondary forest. The soil C (<0.75%) and N (<0.01%) content at surface soil (0-10,10-20cm) of these forest were less than that of neighborhood secondary forest. The soil volume weight (116-172g/100ml) at surface soil was higher than that of neighborhood secondary forest. Total basal area at sediment deposit stands more closely correlated with soil volume weight. In contrast, total basal area at colluvial slope stands more closely correlated with electrical conductivity.
