RESULTS OF THE IUFRO 1982 SCOTS PINE (PINUS-SYLVESTRIS L) PROVENANCE EXPERIMENT IN SOUTHWESTERN GERMANY

Seed of 24 provenances of Scots pine (Pinus sylvestris L.) from 13 cou ntries within the area of natural distribution was sown in 1983. Durin g the first 3 years in the nursery several traits were measured and as sessed, e.g. height growth and the number of twigs in the uppermost wh orl. In spring 1986 a field trial (3.3 ha) has been established in for est district of Bensheim, southwestern Germany. During the last years the following traits were measured and assessed: height growth after s everal vegetation periods, diameter at breast height, branching, stem form, damage by the beetle Brachyderes incanus and mortality. Regardin g these characters the provenances show a considerable variation and c an be divided into at least 6 main groups (clusters).