There is one black poplar (Populus nigra) along the street Voorsterklei, corner Hoenstraat in Voorst.
The girth of the tree is 5.13 m measured at a height of 1.30 m (May 19, 2011, Jeroen Philippona). Its height is exactly 28.00 m (Nov 1, 2009, laser with Sine method (e.g. Nikon Forestry 550 laser rangefinder), Jeroen Philippona). This tree was planted around the year 1900 ± 10, which makes it around 113 ± 10 years old (Jeroen Philippona, Oct 1, 2011).
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.
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The girth of the tree is 5.13 m measured at a height of 1.30 m (May 19, 2011, Jeroen Philippona). Its height is exactly 28.00 m (Nov 1, 2009, laser with Sine method (e.g. Nikon Forestry 550 laser rangefinder), Jeroen Philippona). This tree was planted around the year 1900 ± 10, which makes it around 113 ± 10 years old (Jeroen Philippona, Oct 1, 2011).
Growth rate
The girth was measured more than once:| Year | Girth@1.3 m | Measurement | Growth rate |
| 2007 | 5.06 m | Jeroen Philippona | - |
| 2011 | 5.13 m | Jeroen Philippona | 2 cm/year |
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Black poplar (Populus nigra) "3768"
