Table 1: Site descriptions of the three experimental sites with one-, two-, and twelve-year-old stands of Robinia pseudoacacia.


Area (ha)8.613.2<2.5
Site installation200620051995
Origin of R. pseudoacacia Müncheberg/Calvörde, GermanyBihor, RomaniaUnknown
Plant age at sampling (years)1212
Plant spacing Double row: (1.80 m + 0.75 m) × 0.85 mSingle row: 1.9 m × 0.8 m
Unit soil area per plant (m2)
Density (plants per ha)920092006500