growth rings spruce tree cross section showing annual |
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navigate by keyword : abies age agriculture annual atmospheric background bark botany brown change chronology climate cross cut dating dendrochronology dried forestry grooves grow growth horizontal layers life lines pattern peel picea ring rings round sample science season section spruce stem surface texture textured tree trunk visible weather wood wooden years |
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Growth rings of a spruce tree, cross section. Horizontal cut through the dried trunk of an European spruce tree, Picea abies, showing the annual or tree rings. A new layer of wood is added every year. |
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