At the Lusatian study site, height growth of tree species and
clones was surveyed once a year in December on a whole plot
basis. Only tree height was measured in order to get a rough
estimate of the growth performance without affecting the
basic population of single plots, which was needed for a precise
estimate of biomass accumulation scheduled after 3 and
6 years. Therefore, the total shoot biomass was harvested first
in winter 1998/1999 and 2001/2002.