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Table 1 Conversion and expansion factors for different tree compartments.

From: Options for accounting carbon sequestration in German forests

species group

spruce

fir

pine

douglas

larch

beech

oak

short rotation broadleaves

Long rotation broadleaves

Density by volume [t/m3][12]

0.3788

0.3629

0.4307

0.4141

0.4873

0.5583

0.5707

0.4618

0.5642

Mean sw/cw-ratio[15]

0.1453

0.2847

0.1541

0.1050

0.0957

0.1929

0.2091

0.1902

0.1929*

Mean needle/cw-ratio[15]

0.0987

0.0987**

0.0871

0.0463

-

-

-

-

-

  1. *Since no separate value for long rotation broadleaves is available, the value for beech is assumed.
  2. **Since no separate value for fir is available, the value for spruce is assumed.
  3. sw = small wood (diameter < 7 cm), cw = coarse wood (diameter ≥ 7 cm)