13aecfe9_cies_Compendium___Sitka_spruce__interpretive_class
[characteristic] potential productivity [comments] site index (50 yr @ bh) approaching 45 m; timber yields of Sitka spruce-western hemlock mixtures close to 2,000 m3 per ha in 100 years on the most productive sites; growth rates of these mixtures are highest in North America [interpretive class] 
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Tree Species Compendium --Sitka spruce
interpretive class