Tree-ring width measurements of living Douglas firs in Central Europe

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...本数据集采用树木生长锥（increment borer）采集花旗松（Douglas fir）的木材样本：从每株供试林木的胸高位置采集两份相对的钻芯样本。所采样的林木生长于……