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    Author(s): KaDonna C. RandolphMike T. Thompson
    Date: 2010
    Source: Gen. Tech. Rep. SRS–127. Asheville, NC: U.S. Department of Agriculture Forest Service, Southern Research Station. 17 p.
    Publication Series: General Technical Report (GTR)
    Station: Southern Research Station
    PDF: View PDF  (3.3 MB)

    Description

    The U.S. Forest Service Forest Inventory and Analysis (FIA) Program uses visual assessments of tree crown condition to monitor changes and trends in forest health. This report describes four crown condition indicators (crown dieback, crown density, foliage transparency, and sapling crown vigor) measured in Colorado, Idaho, Nevada, Utah, and Wyoming between 1996 and 1999. Descriptive statistics are presented by species and FIA species group. Inter- and intra-species variation, crown condition stressors, and statistical concerns that should be considered when analyzing and interpreting the crown condition data are discussed.

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Randolph, KaDonna C.; Thompson, Mike T. 2010. Descriptive statistics of tree crown condition in the United States Interior West. Gen. Tech. Rep. SRS–127. Asheville, NC: U.S. Department of Agriculture Forest Service, Southern Research Station. 17 p.

    Keywords

    Crown density, crown dieback, FIA, foliage transparency, forest health, sapling vigor

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