The High Input of Soil Organic Matter from Dead Tree Fine Roots into the Forest Soil

Table 1

Site and stand characteristics at Forsmark and Laxemar. Picea abies = P. a., Pinus sylvestris = P. s., Betula verrucosa = B. v., Alnus glutinosa = A. g., Quercus robur = Q. r.

Stand characteristics	Coniferous,; Calluna empetrum	Coniferous fern	Alnus; swamp herb	Herb rich oak forest	Coniferous; Vaccinium myrtillus	Alnus; shore forest
Soil moisture class^1	Fresh	Fresh/moist	Moist	Fresh	Fresh	Moist
Soil type^1	Leptosol	Regosol/Gleysol	Gleysol	Histosol/Gleysol	Histosol	Histosol
Tree age	59–60	80–88	85–95	112	55	34
Number of trees /ha	1340	780	3340	200	400	1600
Tree height (m)	16.3	19.8	18.5	17.1	21.0	11.6
Diameter at breast height (dbh in m)	0.21	0.26 (P. a.)	0.31 (P. a)	0.36	0.32	0.14
Basal area (m^2/ha)	22.5 (P. a.)	20.5 (P. a.); 6.5 (B. v.)	5.3 (B. v.); 7.3 (A. g.); 3.0 (P. a.); 2.3 (P. s.)	15.0 (Q. r.)	15.5 (P. a.)	17.5 (A. g.)

¹[40, 41].