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- Breast height point should be marked by intersecting vertical and horizontal lines 12 cm long, painted with white paint
- Breast height should be marked by means of a measuring stick on standing treesat 1.37m or 4 ft 6 in above the ground level, but 1.3 (4’3”) in case of FAO
- On the sloppy ground, the diameter at breast height should be measured on the uphill side, after removing any dead leaves or needles lodged there
- In the case of leaning tree, dbh is measured alone the tree stem and not vertically.
- Breast height mark should be shifted up or down as little as possible to a more normal position of the stem and then diameter measured if stem is abnormal.
- Buttress is formed due to edaphic factor so if buttress is seen, the dbh should be taken a little above the buttress formed.
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