Two large-scale silvicultural experiments on natural regeneration of beech in Denmark demonstrated a significant increase in site productivity as measured by height growth. In both cases there was an increase from the previous to the present generation and, in one case also during the development of the present generation. The increase was approx. 3.6 m (at a reference age of 100 years) during the period 1920s1990. The conclusion is sustained by comparisons with the height growth of beech planted after beech.
Key words: growth and yield, growth trends.
Correspondence: J. P. Skovsgaard, Danish Forest and Landscape Research Institute, Hørsholm Kongevej 11, DK-2970 Hørsholm, Denmark
Telefax: +45-45-763233