Forest condition in Finland, 1986-1990.
Salemaa, Maija, Jukola-Sulonen, Eeva-Liisa, Lindgren, Martti
Silva Fennica · 1991
doi:10.14214/sf.a15605 (opens in a new tab)
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Abstract
The results of the Finnish forest condition survey carried out during 1986â90 in background areas are presented. The same 3,388 forest trees (1,897 Scots pines ( L.), 1,289 Norway spruces ( (L.) H. Karst. And 202 broadleaves) on 450 mineral soil sample plots were examined annually. Growth characteristics (defoliation, the number of needle age classes, branch damage and needle discolouration), fertility and abiotic and biotic damage express the general vitality of the trees and are not specific for air pollutants. A correlative approach was applied in analysing the factors which may explain the regional pattern and changes in defoliation.Pinus sylvestrisPicea abiesAscocalyx abietina
Abstract licence: CC BY-SA
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