Forest Measurement and Modelling.
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Average diameter of stand Forest Measurement and Modelling. |
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The average diameter at breast height (dbh) is occasionally used to describe a relatively homogeneous stand. The arithmetic- or quadratic- mean dbh is the usual statistic calculated:  These mean values may be used in conjunction with estimates of the number of trees / ha to determine competition within a stand. The mean values may also be compared with the median and mode dbh to determine if the diameter distribution is skewed. The quadratic mean diameter has a stronger correlation to stand volume than does the arithmetic mean. The basal area of a tree with dbh equal to the quadratic mean diameter is equal to the mean basal area of the stand. |
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[s_diam.htm] Revision: 6/1999 |