BOTANY
FORESTRY
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]


0”5”


5”10”


10”15”


None of the above

Detailed explanation1: Tree diameter is usually measured at 4.5 feet (ft) above ground level. Measurement at this height is referred to as diameter at breast height or DBH. DBH can be measured with a specially calibrated tape measure called a diameter tape (dtape) available from most arborist or forestry supply dealers.
Detailed explanation2: DBH is measured on standing trees outside of the bark. Diameter can be calculated by measuring the circumference of the tree, then divide circumference by (3.1416).
Detailed explanation3: DBH means the diameter of each tree is measured at “breast height”, defined as 1.35m up from the highest point of ground at the tree’s base (See the Tree Circumference Guide for some pictorial examples). DBH measurements can be used to estimate the volume, biomass, and carbon storage of trees.
Detailed explanation4: The relationship between tree height (h) and diameter at breast height (dbh) is often used to characterise forest stands. Furthermore, h is also a required input variable in most single tree volume and biomass equations. However, measuring h is, in general, more time consuming than measuring dbh.