Table 3. Stand characteristics after 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														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 (%)	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	752a	167.8	12a	0.7	76a	4.1	14.9a	1.2	13.1a	0.2	101.4a	19.7	Pine, 97	20	45
	BCTp	5	874a	93.4	13b	0.9	84bc	6.9	14.8a	1.0	13.0a	0.2	96.6a	15.5	Pine, 93	10	50
	BCTf	5	942a	137.2	13ab	0.5	83ab	2.8	14.2a	0.7	12.9a	0.1	87.6a	9.5	Pine, 96	26	48
	BCTsemi1	5	972a	244.1	14b	1.2	90c	6.7	15.1a	1.2	13.1a	0.3	92.7a	16.9	Pine, 91	16	50
Planted pine stand	Sel1	5	816a	79.2	14a	1.7	83a	11.1	15.5a	0.7	12.1a	0.4	102.2a	11.8	Pine, 82	3464	11
	BCTsemi1	4	1006b	92.6	15a	1.8	92a	11.7	15.0a	0.7	11.9a	0.3	91.2a	11.3	Pine, 82	3126	9
	BCTsel	6	952b	90.4	15a	2.0	90a	12.3	15.2a	0.5	12.0a	0.1	94.6a	7.6	Pine, 81	1520	12
Planted birch stand	Sel2	3	590a	17.3	8a	0.7	55a	7.0	12.9a	0.8	13.8a	1.1	94.1a	14.5	Birch, 88	663	44
	BCTsemi2	3	793b	37.9	8a	1.7	53a	13.3	11.0b	0.9	12.3a	0.6	66.0b	14.1	Birch, 77	476	45
	BCTsemi3	3	863b	61.1	8a	1.4	49a	11.1	10.6b	0.7	11.5a	1.0	56.5b	11.5	Birch, 64	3967	38
* Data for the same experiment marked with different letters are significantly different (p < 0.05) according to the one-way ANOVA and post hoc LSD tests after Levene’s test for equal variances.