Sapwood estimation

According to Gjerdrum's Heartwood Age Rule (HAR). See:
Gjerdrum, Peder: Estimating missing sapwood rings in three European gymnosperm species by the heartwood age rule, Dendrochronologia 31 (2013) 228–231 (via researchgate.net).
Min. estimation of missing rings to pithMax. estimation of missing rings to pithNumber of measured ringsNumber of measured sapwood ringsYear of last measured ringSpecie: PISY, LADE or PICEProposed dating (to make a mark in the diagram)Sample identity
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Sapwood diagram



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