The most complete information regarding the form of a tree can be given by means of a taper tables or taper curves. It shows the average diameter at any point on the stem for trees of different diameter and height.

Uses

• To find volume of the average tree for each diameter and height class readily in office without direct measurement, the only dbh (o.b.) need to measure
• To prepare volume tables. The construction of taper tables/curves for a certain species or group of species is still different. So, no greatly accept expression for taper curve.

Kinds of Taper Table

1. Ordinary Taper Table: It is also called diameter taper table. This table gives the taper directly for diameter at BH Volume can be computed without referring to the tree form
2. Form class taper table: This table gives different form classes of the diameters at fixed points on the stem expressed as percentages of dbh (o.b.)