Microbial Processes > Long-Term Soil Productivity (LTSP) Study > Forest Locations > Intermountain Region and Southern Oregon Cascades

Mixed conifer forests of western redcedar, mountain hemlock, Western white pine, Douglas-fir, and spruce are typical of the mountainous West. Their range extends from the Oregon Cascades eastward to Western Montana. Much of the growing season is characterized by low soil moisture with high evaporation, which can reduce the success of forest regeneration. Soils are weakly developed and formed from parent materials including volcanic ash, granitics, basalts, and sedimentary rocks. LTSP cooperation among the Forest Service's Rocky Mountain and Pacific Northwest Research Stations and the Intermountain, Rocky Mountain, and Pacific Northwest Regions has led to the installation of experimental sites in north and central Idaho and southern Oregon.

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