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    Author(s): Thomas W. Popham; Roger L. Baker
    Date: 1987
    Source: Res. Note SO-334. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 4 p.
    Publication Series: Research Note (RN)
    Station: Southern Forest Experiment Station
    PDF: View PDF  (279 KB)

    Description

    Foliar cover estimates of woody and herbaceous understory vegetation were done on twenty l-m2 plots for a variety of forest types in Alabama. The methods of estimation were ocular, loop-densimeter assisted ocular, and point frame. The point frame was used as the standard and the other two methods were compared using chi-square. Some ocular estimates were accurate, but the number and amount of inaccurate estimates were sufficient to result in a statistically significant difference at a=0.05. A difference existed in the ability of estimators to accurately estimate foliar cover of different vegetation groups. Therefore, ocular and loop-densimeter assisted ocular estimates did not provide consistently accurate estimates of the proportion of foliar cover of understory vegetation for forests in Alabama.

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    Citation

    Popham, Thomas W.; Baker, Roger L. 1987. Ocular and Densimeter Estimates of Understory Foliar Cover in Forests of Alabama. Res. Note SO-334. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 4 p.

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