Tree-ring width measurements of Douglas fir from Staufen im Breisgau from 196...

Wood samples from Douglas fir trees were taken using an increment borer. From each tree two opposing increment cores were taken at breast height. The sampled trees stood in an...

研究人员采用生长锥（increment borer）采集花旗松（Douglas fir）的木材样本。每株供试树木均在胸高（breast height）位置采集两份相对分布的钻芯样本。所取样的树木生长于……