Tim Spagnoletti

ABSTRACT

The purpose of this study was to aid the Soil Conservation Service, which is currently mapping the Boundary County soils, by providing more information on the relationships among soils, vegetation and parent material, and on the significance of vegetational patterns in the area.

To do this, a number of soil characterizations were done as well as less extensive study of other sites.  Vegetation was habitat typed and analyzed.  Site quality for tree growth was also provided.

The data and analysis indicate that there may be no Pseudotsuga menziesii/Physocarpus malvaceous-Symphoricarpos albus or Abies grandis/Pachistima myrsinites climax habitat type in the study area.  Tsuga/Pachistima and Thuja/Pachistima habitat type may be climax on slopes of all aspects.  Secondly, the data and analysis indicated that the coolest and wettest aspects are west to north.  Third, there may be a difference in the ability of the Alfisol soil and the Inceptisol soil to support vegetation.  Finally, there is a possibility that given enough time, the Alfisol will develop into an Inceptisol and both soils may develop spodic horizons.