Table 2.

Stand density, mortality, and maximal relative volume growth of the MacKay thinning trial in Alberta, Canada, in which naturally regenerated lodgepole pine (Pinus contorta Douglas) stands were submitted to a gradient of pre-commercial thinning intensity.

Treatment code*	Stand density (Stems/ha)		Mortality (%)			Max relative volume growth (%)
	1954	2013	Total	Thinning	Nature
A1	4,330	1,593	85	60	25	104
A2	2,990	1,173	89	72	17	116
A3	1,680	840	92	84	8	97
A4	2,990	1,124	90	72	17	107
A6	10,762	2,462	77	–	77	100
B1	4,330	1,494	87	64	24	100
B2	2,990	1,082	91	75	16	86
B3	1,680	1,074	91	86	5	85
B4	2,990	1,396	88	75	13	98
B6	11,887	2,850	76	–	76	100
C1	4,330	1,457	85	56	29	109
C2	2,990	1,334	86	69	17	125
C3	1,680	1,037	89	83	7	102
C4	2,990	1,569	84	69	15	103
C6	9,762	2050	79	–	79	100
D1	750	602	94	92	2	95

Maximum relative volume growth after a 60-year experimental period was calculated as the ratio of the volume obtained in the treated vs. control stands (see Eq. 1).

^*Treatment code represents the combination of block name and plot number at the MacKay thinning trial.