The present study will inform about: (1) the suitability of
different tree species for marginal sites in terms of their yieldpotential and the sustainability of biomass supply for energy
transformation purposes, (2) the influence of different management
options (rotation period, soil amelioration) on the
productivity of fast growing tree species, (3) the influence of
trees on associated crops in agroforestry systems, and (4) an
assessment of alley cropping systems as an option for the
future use of marginal sites.