The forest inventory is basically a data collection activities. This activity is
relatively important, because the effect on further activities. Hence the data collected
must have a high enough accuracy. A way of determining the sampling unit is
considered to be simpler, easier, and faster is the tree sampling method. The
purpose of this study was to quantify the potential large stands of eucalyptus in the
Forest of eucalyptus plants in the Faculty of Forestry and calculate the relative
efficiency of sample unit. The total area is 0.11 ha of eucalyptus stands. Unit
examples used are circular, 4-trees sampling, sampling 5-trees, and 6-trees sampling
is done by simple random sampling method. Potential stands of eucalyptus with
method 4 sample trees have an average volume stands perplot is 0.096 m3, with the
volume of the stand for the entire area is 111.09 m3 with a sampling error of 43.65%.
Potential stands of eucalyptus trees by the method of example 5 has a volume
average stocking each plot is 0.091 m3, with the volume of the stand for the entire
area is 105.40 m3 with a sampling error of 51%. Potential stands of eucalyptus by
using 6 sample trees have an average volume stands each plot was 0.08 m3, with
the volume of the stand for the entire area is 92.83 m3 with a sampling error of
54.77%. Potential stands of eucalyptus with a diameter circular sample plots of 12 m
has an average volume stands each plot is 6,37 m3, with the volume of the stand for
the entire area is 65.61 m3 with a sampling error of 22.63%.
Keywords: inventory, forest plantation, eucalyptus.