On both sites the highest yields ofwoody biomasswere found for R. pseudoacacia L. regardless
of rotation period and amelioration measures. On loamy substrates in the Helmstedt
mining district, all tree species and clones responded positively to soil amelioration measures.
In the agroforestry system in Lusatia, special emphasis was given to the interaction
between trees (R. pseudoacacia) and crops (Medicago sativa L.). Considering the land equivalent
ratio (LER), R. pseudoacacia hedgerows have practically no negative influence on yields
of M. sativa. Hence, with regard to an increasing demand for woody biomass, alley cropping
with R. pseudoacacia and crops such as M. sativa may provide a promising alternative for
future land use in the temperate zone.