A ring in the cross section of the stem or root of a temperate woody plant, produced by one year’s growth.
- The oldest tree in the present study had 135 annual rings at the stem base.
- It was concluded from structural observations that duration of cambial activity is longer in trees with broad annual rings than in trees with narrow rings.
- The amount of tension wood in a section was quantified as the total area of all tension wood bands in the second annual ring, divided by the total area of the ring.
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