Tree-ring width of Quercus species from historical object sample 5402B/01A, Netherlands, Zutphen

Species: Quercus species; No of rings: 60; first year: 1490; end year: 1550; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 14; Last ring under bark: absent物种：栎属（Quercus）植物；年轮总数：60；起始年份：1490年；终止年份：1550年；髓心（Pith）：不适用；心材（Heartwood）：完整；边材（Sapwood）：不完整；边材年轮数：14；树皮下末次年轮（Last ring under bark）：缺失