Table 2. Summary statistics of the experimental plots for Korean white pine plantation.

Measurement year (Agea)	Experiment	Residual trees (N/ha)	Tree-level					Stand-level
			Average DBH (cm)	Average height (m)	Average basal area (cm2)	Average volume (m3)	Average biomass (kg)	Basal area (m2/ha)	Volume (m3/ha)	Biomass (ton/ha)
1981 (7)	1	2760	3.1	2.6	9	0.0123	5.6	2.2	29.8	13.6
	2	2180	2.0	2.0	4	0.0114	2.6	0.7	22.2	5.2
1984 (10)	1	2732	5.3	3.9	28	0.0169	15.2	7.6	46.1	41.8
	2	2172	5.0	3.4	23	0.0150	13.1	4.9	32.6	28.4
1988 (14)	1	2660	7.8	5.3	57	0.0280	31.3	15.3	74.4	84.3
	2	2156	8.3	4.8	59	0.0258	32.8	12.8	55.6	70.9
1991 (17)	1	2420	10.1	7.0	94	0.0468	51.2	23.1	113.2	126.5
	2	2080	11.2	6.5	107	0.0466	59.2	22.3	96.9	123.8
1994b (20)	1	1616	13.2	9.9	150	0.0848	82.0	24.6	137.1	135.5
	2	1624	13.5	9.2	150	0.0798	83.3	24.8	129.5	137.6
1997 (23)	1	1536	15.7	11.2	210	0.1289	116.1	32.7	197.9	181.5
	2	1604	15.5	10.6	198	0.1154	110.6	32.2	185.1	180.0
2010 (36)	1	1200	20.0	15.0	330	0.2598	190.2	40.1	311.8	232.8
	2	1416	19.8	13.1	324	0.2209	186.2	46.1	312.7	265.1
2015 (41)	1	1072	22.1	19.4	401	0.4008	236.0	43.4	429.7	255.8
	2	1344	21.3	16.2	380	0.3126	218.7	51.4	420.2	295.7
2020c (46)	1	708	24.3	20.1	499	0.5042	293.9	35.3	357.0	208.1
	2	932	22.9	17.4	441	0.3872	257.5	41.1	360.8	239.9

Age is a mean age of experiment 1 and 2.
The first thinning was executed on November 1991, and thus the number of trees was decreased in 1994.
The second thinning was executed on November and December 2016, and thus the number of trees was decreased in 2020.