Tree-ring width of Quercus species from historical object sample 5102B/04A, Netherlands, Groningen

Species: Quercus species; No of rings: 87; first year: 1386; end year: 1473; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent物种：栎属（Quercus species）；年轮数量：87轮；起始年份：1386年；结束年份：1473年；木心：不适用；心材：缺失；边材：缺失；边材轮数：0轮；树皮下方最后一轮：缺失。