Tree-ring width of Quercus species from historical object sample 6447B/07M, Netherlands, Zutphen

Species: Quercus species; No of rings: 53; first year: 1286; end year: 1339; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent

物种：栎属（Quercus species）；年轮数：53；起始年份：1286年；终止年份：1339年；木心：不适用；心材：缺失；边材：缺失；边材年轮数：0；树皮下的最后一轮年轮：缺失。