Tree age measurement- When you make cross section of the trunk you'll see some rings. This annual ring formation is so regular, for this reason the age of a tree may be accurately calculated simply by counting the rings "each ring represents one year of growth". Because the vascular cambium suspends its activity during fall and winter when the tree becomes dormant, ring growth occurs only during spring and summer. Each annual ring consists of several layers of large xylem cells, referred to as springwood, followed by progressively smaller cells, the summerwood.

Tree volume measurement-1-Tree climbers can physically measure the height and circumference of a tree using a tape. The distance from the highest climb point and the top of the tree is measured using a pole that extends from the tree top to the anchor point of the tape. This height is noted and the diameter of the tree is measured at that point. The climber then rappels down the tree measuring the trunk circumference by tape wrap at different heights with the height of each measurement referenced to the fixed tape running down the trunk.

2-Remote measurements of trunk volume are usually made from a position on the ground where the observer has a clear view of the entire length of the trunk. Measurements may be made using professional surveying equipment such as a total station

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