Table 2: Average biomass per plant compartment and shoot : root ratio calculated as (shoot + stump)/(fine roots + coarse roots) for different plant ages of Robinia pseudoacacia (standard deviation is given as error).

Biomass (kg dry matter per plant)
Initial1 years2 years12 years

Coarse roots
Fine roots
Stump
Shoot
Shoot : root3.50.20.72.0