The correlations between environmental factors and
site index were quanti®ed covering the range of climatic,
topographic and edaphic conditions in the
province of Firenze. The plantations were stratfied
in 31 environmental strata, by the following characters:
(i) litology (as assessed by Canuti et al., 1989);
(ii) land use potential (as assessed by Provincia di
Firenze, 1997); (iii) climate type (as assessed by Bigi
and Rustici, 1984); (iv) site quality (as assessed by
Cappelli and Gabellini, 1994).