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Pearson product-moment correlations between mean number of tracheids produced (n = 5 trees/site) in two weekly intervals during June through August 2006-2007 and climate parameters (mean daily maximum temperature, d.d., precipitation sum) at the timberline (a-d), treeline (e-h) and krummholz site (i-l). ** p ≤ 0.01; * p ≤ 0.05.
