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Giant sequoia on the landgoed Sandwijck

This page contains specific information about giant sequoia (Sequoiadendron giganteum) '172', which can be found on the landgoed Sandwijck in De Bilt.

Girth growth rate

The girth was measured more than once:
YearGirth@1.3 mMeasurementGirth growth rate
2000~4.64 mD. C. Hasselman-
20064.90 mMargriet Janssen4 cm/year

The growth rate shown in the table shows the yearly average increase in girth since the last measurement. This value only gives an indication of the growth rate, since every measurement could be done at slightly different heights and during different periods of the year.

Height

The height was measured more than once:
YearHeightMeasurementMeasurement method
2006>30.00 m Margriet JanssenMeasurement method unknown
2011-02-0133.40 mJoris HellevoortLaser with Sine method (e.g. Nikon Forestry 550 laser rangefinder)

Each measurement can be done with varying accuracy.

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Photos

The photos are provided by Margriet Janssen.

Landgoed Sandwijck, picture by Margriet Janssen, 2006-06-05

Landgoed Sandwijck, picture by Margriet Janssen, 2006-06-05

Landgoed Sandwijck, picture by Margriet Janssen, 2006-06-05

Landgoed Sandwijck, picture by Margriet Janssen, 2006-06-05

Landgoed Sandwijck, picture by Margriet Janssen, 2006-06-05

Show all images (6 in total)...

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