At the Lusatian study site the above-ground biomass accumulation
after 6 years ranged from 4.5 tha−1 dry matter for S.
viminalis to 29.8 tha−1 dry matter for R. pseudoacacia (Fig. 4a).
This enormous variation in productivity reflects differences of
the adaptability of Populus spp., S. viminalis and R. pseudoacacia
to specific site conditions even more clearly than height does