Note that this VegX export includes only the largest of 157 CTFS plots
(Site table), albeit with 90% of the StemObservation rows[1]:
* According to Shash, "The Veg-X file I gave you is of only one plot "bci" of Id = 1and all quadrats belongs to the same plot bci." (e-mail on 2012-2-9)
* Extracts such as VegX_CTFS_row_180000.xml have just one "top-level" <plot> entry without a <relatedPlot>:
-----
        <plot>
            <plotUniqueIdentifier>1</plotUniqueIdentifier>
            <plotName>bci</plotName>
        </plot>
-----
This is important, because it indicates that VegX creates a ~6x increase in
storage size (613.6 MB for bci.sql vs. 3.78 GB for
VegX_CTFS_row_*.xml with 1 plot, assuming roughly equal #s of stems per plot).

[1] bci plot has 2118974 of 2356190 StemObservation rows:
SELECT "PlotName", COUNT(*)
FROM "Plot"
LEFT JOIN "PlotObservation" USING ("PlotID")
LEFT JOIN "StemObservation" USING ("PlotID", "CensusID")
GROUP BY "PlotID"::int, "PlotName"
ORDER BY "PlotID"::int