Tree-ring width measurements of Douglas fir from Strass im Strassertale from ...

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...采用树木生长锥（Increment Borer）采集花旗松（Douglas fir）的木材样本：从每棵采样树木的胸高位置获取两枚相对的生长芯样，所采样的林木生长于……