Table 1. Stand characteristics before selective (Sel) and boom-corridor (BCT) thinning treatments. Dbh = diameter at breast height (1.3 m). The thinning treatments are described in Table 2.
Trees dbh ≥ 70 mm																Proportion of stems (%) by dbh classes			Undergrowth dbh < 70 mm
Experiment	Treatment	No. of plots	No. of stems* (ha–1)		Stand basal area* (m2 ha–1)		Volume* (m3 ha–1)		Mean dbh* (cm)		Mean height* (m)		Mean stem volume* (dm3)		Tree species proportion by number (%)	dbh 70–99 mm (%)	dbh 100–160 mm (%)	dbh > 160 mm (%)	No. of stems (ha–1)	Mean dbh (mm)
			Mean	±SD	Mean	±SD	Mean	±SD	Mean	±SD	Mean	±SD	Mean	±SD
Seeded pine stand	Sel1	5	1740	379.8	24	2.3	154	14.1	13.0	0.9	12.5	0.2	88.6	13.5	Pine, 97	13	68	19	20	45
	BCTp	5	1780	236.1	27	1.2	176	6.6	13.4	0.6	12.6	0.1	98.6	10.1	Pine, 92	14	59	27	10	50
	BCTf	5	1780	241.4	24	2.6	160	17.6	12.9	0.7	12.6	0.2	90.0	9.8	Pine, 97	11	71	18	26	48
	BCTsemi1	5	1563	517.0	23	6.7	153	44.1	13.4	1.3	12.6	0.3	98.0	20.0	Pine, 94	11	59	29	16	50
Planted pine stand	Sel1	5	1620	365.0	23	5.7	138	16.3	13.2	0.7	11.4	0.5	85.4	9.3	Pine, 83	14	70	16	3464	11
	BCTsemi1	4	1688	188.7	25	3.4	150	16.1	13.2	0.2	11.4	0.2	88.7	2.9	Pine, 78	19	59	22	3126	9
	BCTsel	6	1592	193.4	22	3.7	131	12.8	12.8	0.9	11.2	0.5	82.0	14.0	Pine, 83	18	66	16	1520	12
Planted birch stand	Sel2	3	1500	360.6	17	3.5	118	27.2	11.8	1.5	13.4	1.4	78.6	22.6	Birch, 91	38	50	12	663	44
	BCTsemi2	3	1550	346.4	15	6.3	100	46.3	10.7	1.2	12.5	0.8	64.5	16.8	Birch, 87	45	49	6	476	45
	BCTsemi3	3	1450	300.0	13	1.2	77	10.3	10.5	1.3	11.2	0.6	52.8	19.3	Birch, 66	53	40	7	3967	38
* No significantly different (p < 0.05) data for the same experiment were found using the one-way ANOVA and post hoc LSD tests after Levene’s test for equal variances.