Table 2. Thinning intensity of first and second thinning by experimental site in Korean white pine plantation.

Thinning experimental site	Plot	First thinning					Second thinning					Thinning intensity class (1st → 2nd)
		No. of trees before thinning (trees/ha)	Thinning intensity (%)		No. of trees after thinning (trees/ha)	Thinning quotient	No. of trees before thinning (trees/ha)	Thinning intensity (%)		No. of trees after thinning (trees/ha)	Thinning quotient
			Stem number basis	Basal area basis				Stem number basis	Basal area basis
Site 1	A	2944	68	50	946	0.86	920	17	8	762	0.70	Heavy → Light
	B	2972	57	38	1285	0.82	1259	45	30	696	0.82	Moderate → Moderate
	C	2901	43	21	1642	0.70	1423	67	50	465	0.87	Light → Heavy
	D	2831	0	0	2831	0	1897	0	0	1897	0	Unthinned → Unthinned
Site 2	A	2786	56	38	1227	0.83	1201	28	14	869	0.80	Heavy → Light
	B	2745	43	26	1569	0.78	1333	41	30	784	0.84	Moderate → Moderate
	C	3240	40	28	1928	0.83	1848	64	50	669	0.87	Light → Heavy
	D	3087	0	0	3087	0	1752	0	0	1752	0	Unthinned → Unthinned
Site 3	A	1595	61	48	618	0.88	618	0	0	618	0	Heavy → Unthinned
	B	1879	43	23	1063	0.73	1026	11	9	915	0.82	Moderate → Light
	C	1683	18	8	1471	0.66	1185	29	23	836	0.73	Light → Moderate
	D	1787	0	0	1787	0	1170	34	29	768	0.76	Unthinned → Heavy