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Dominating tree layer class
Bare forest land
Pine forest
Spruce forest
Mixed pine and spruce forest
Deciduous forest
Mixed deciduous coniferous forests
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17/3/2006

Tree layer

The tree layer indicates occurrence of tree species class of the land use class forest land. Except for the common forest trees, species normally formed like bushes also are included on conditions that their diameter at breast height is above 50 mm, and that their stems are fairly straight (for example hazel and sallow).


Dominating tree layer class Bare forest land Pine forest Spruce forest
Mixed pine and spruce forest Deciduous forest Mixed deciduous coniferous forests

 

Tree species classes have been formed in the following way:

Class

Consisting of (share of basal area)

Bare forest land

(0) Bare forest land constituted of cutting class (A1) proper bare forest land and (A2) unsuitable brushwood

Pine forest

(1) >= 7/10 pine + contorta (Pinus sylvestris and Pinus contorta, respectively)

Spruce forest

(2) >= 7/10 spruce (Picea abies)

Mixed pine and spruce forest

(3) >= 7/10 pine + contorta + spruce = (coniferous)

Deciduous forest

(4) >= 7/10 birch + other deciduous trees + other nemoral deciduous trees = (deciduous)

Mixed deciduous coniferous forests

(5) >= 7/10 oak + beech = (oak/beech)
(6) 5-6/10 coniferous 3-5/10 deciduous (0-2/10) oak/beech
(7) 5-6/10 coniferous <= 2/10 deciduous (2-5/10) oak/beech
(8) 3-4/10 coniferous (4-6/10) deciduous 0-2/10 oak/beech
(9) 3-4/10 coniferous (<= 4/10) deciduous 3-6/10 oak/ beech
(10) <= 2/10 coniferous (6/10) deciduous 2/10 oak/beech
(11) <= 2/10 coniferous (2-6/10) deciduous 3-6/10 oak/beech

 

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