Tree-ring width of Quercus species from historical object sample 6720B/03A, Netherlands, Zutphen@en

Species: Quercus species; No of rings: 52; Age not determined; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 15; Last ring under bark: present物种：栎属（Quercus）植物；年轮总数：52；树龄未测定；髓心：不适用；心材：完整；边材：完整；边材年轮数：15；树皮下方存在末次年轮。