Old growth in northwestern California national forests
U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1996 - Nature - 47 pages
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California black oak California National Forests canyon live oak David Diaz diameter per acre Douglas-fir old growth Douglas-fir/tanoak old growth feet tall fir-a foxtail pine growth in northwestern hardwoods incense-cedar inches in d.b.h. inches in diameter interior ponderosa pine inventory Klamath National Forests large-sized trees layers least 20 inches lf greater live tree criterion lodgepole pine Mendocino Mendocino National Forest mixed subalpine mountain hemlock northwestern California National old-growth definitions old-growth Jeffrey pine old-growth mixed conifer old-growth red fir old-growth types old-growth white fir overstory Pacific Douglas-fir old Pacific madrone Pacific ponderosa pine percentage of cover plot pristine old growth pristine old-growth stands Rivers and western Shasta-Trinity snags and logs snags at least sugar pine tallied tanoak total basal area tree measured tree species trees at least trees per acre type in northwestern type is SAF understory USDA Forest Service western Klamath National western white pine White fir type White fir-ac whitebark pine