Tree-ring width measurements of Douglas fir from Bad Kissingen from 1979 to 2023

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。每株供试林木均在胸高处采集两枚相对的生长锥芯样。本次采样的林木生长于……