The families of the site index curves that encompass the
range of site indices of both experimental sites are presented in
Figs. 2 and 3, together with the respective observations. At the
Gambo–Shashemene site the shape of the observed dominant
height growth curves seem to vary more around the site index
system, than at the Munesa site. Nevertheless, there was no
significant indication for site dependent variation of the shape parameters of the model (Eq. (3)) The curves extended below
the lower age classes for Gambo–Shashemene (