Dynamics of light interception, leaf area and biomass production in Populus clones in the establishment year G.E. Scarascia-Mugnozza, J.G. Isebrands, T.M. Hinckley and R.F. Stettler Ann. For. Sci., 46 Supplement (1989) 515s-518s DOI: 10.1051/forest:198905ART0116