Tree-ring width of Quercus species from historical object sample 6137B/03A, N...

Species: Quercus species; No of rings: 40; first year: 1221; end year: 1261; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring...样本所属物种为栎属（Quercus）物种；年轮总数为40；生长起始年份为1221年，终止年份为1261年；髓心（Pith）：不适用；心材（Heartwood）：缺失；边材（Sapwood）：缺失；边材年轮数：0；末次年轮……