Question

Age of a tree can be estimated by

• A. it’s height and girth
• B. the number of annual rings
• C. it’s biomass
• D. the diameter of the heartwood

Answer 1

The correct option is B the number of annual rings

Age of a tree can be estimated by counting the number of annual rings in a cut stem. The two kinds of wood (spring and autumn wood) appear as alternate concentric rings of light and dark colour, respectively. Thus, one annual ring comprises one circle of springwood (lighter in colour) and autumn wood (dark in colour) both. One annual ring corresponds to one year. The science of counting and analysis of annual growth rings of trees is called dendrochronology.