Times dating back

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A new layer of wood is added in each growing season, thickening the stem, existing branches and roots, to form a growth ring.

Growth rings, also referred to as tree rings or annual rings, can be seen in a horizontal cross section cut through the trunk of a tree.

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New growth in trees occurs in a layer of cells near the bark.The formula is useful for correct approximation of samples data before data normalization procedure.Dendrochronology makes available specimens of once-living material accurately dated to a specific year.Adequate moisture and a long growing season result in a wide ring, while a drought year may result in a very narrow one.Direct reading of tree ring chronologies is a learned science, for several reasons.

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