The effects of plantation density (espacement) on the growth and yield of lodgepole pine (Pinus contorta Dougl. var. latifolia Engelm.) are reported 20 growing seasons after planting. Five densities (500, 1000, 1500, 2000, and 2500 trees per hectare) were established on plots in central British Columbia. Both individual-tree and per-hectare data were analyzed. With the exceptions of mean height, periodic height growth, and survival, espacement had a statistically significant effect on all of the characteristics examined. Although this report provides only short-term information on the effects of espacement, it does indicate the need to optimize individual-tree growth rates with levels of growing stock in order to maximize yield per unit area.
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Updated April 12, 2011