In 1984 growth was reduced for one-year to the levels of 1964 and 1974. The mean growth values are also close to the long-term average. Average ring-growth pattern of spruce, fir and beech with upper and lower standard error bands for the mean. Conclusions Data collected over a broad area show no growth reductions for different tree species in the most recent years. After showing a decline in the 1970s, fir experienced a growth recovery in the 1980s.
Preliminary results suggest that radial increment is currently being promoted rather than limited.
This hypothesis also forms a basis for current research projects and the establishment of new permanent monitoring plots.