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A variable area plot method of assessment of forest condition and trend

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Table 1: Estimated density (e)/actual density (a) fromsub-set of and sampling error figures (PLE, see text for definition)are relative to the parameter of 10 computer sampling runs in a mapped bitterbrushpopulation, using fixed area plots designed to conta
Figure 1: Log-log plot of stems/ha in the Whitcombe River survey area. Solid diagonal line "SSR"and "SSB" lines are standard error boundaries of the two regressions.Abbreviations used are:AT Archeria traversii; AS Aristotelia serrata; CS Carpodetus serratu
Table 4: Means (Av) and standard deviations (S) of stem densities and basal areas by 20m x 20m fixed area (FA)and variable area (V A) sampling with taret counts of 30 stems per plot in the Whitcombe River survey area, andthe estimated V A sampling requirements to obtain precision equal to that obtained by FA sampling.
Figure 2: Log-lot plot of basal areas (m/ha) by FA andare as for Figure VA sampling in the Whitcombe River survey area
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