If forking renders the BH point abnormal, foregoing rule should be applied and the tree is counted as one or two depending on the place of measurement. If tree is forked below the BH, each fork should be treated as separate tree. ![]() If tree is forked above BH, it should be considered as a single tree. In abnormal trees, BH mark should be shifted little up or down as little as possible to a more normal position of stem and diameter is measured. Convenient height for taking measurement. In New Zealand, DBH is measured at 1.4 m. In Europe, Australia and UK, DBH is taken as 1.3 m which is recommended by FAO as standard. Universally adopted standard height for measuring girth, diameters and basal area of standing trees is 1.37 m and being practiced in India, Burma, America, Union of South Africa and other British Colonies. Generally DBH is not measured on dead trees or on those of less than 7 cm DBH. Diameter at Breast Height (DBH) is the most common parameter used in the measurement of standing timber. When measuring live trees most information is presented as over bark dimensions. Because trees are measured with the bark on, this is also called the Diameter at Breast Height Over Bark (DBHOB). By convention, the diameter of forest trees is measured in centimeters at 1.37 m above the ground and is termed the “Diameter at Breast Height” or DBH. In many countries, especially India, this will be at 1.37 m above the base of the tree where the tree meets the ground. In the past, girth has been used but this is no longer recommended.Ī carefully defined point should be used for measuring the diameter of the tree. In forestry, diameter should always be used for the description of the tree.
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