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The Calibration and Use of Capacitance Sensors to Monitor Stem Water Content in Trees

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Measuring tree height and preparation volume table using an innovative method.

Majid Lotfalian¹, Zahra Nouri, Yahya Kooch

¹Faculty of Natural Resources, University of Mazandaran, P.O. Box 737, Badeleh, Sari, Iran.

Pakistan Journal of Biological Sciences : PJBS

|December 20, 2008

Summary

This study develops a species volume table for Zarbin cypress (Cupressus sempervirence var. horizontalis) in the Roodbar region. A new, more accurate tree height measurement method was introduced to aid forest inventory and management.

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Area of Science:

Forestry and Wood Science
Botany
Ecology

Background:

The Zarbin cypress (Cupressus sempervirence var. horizontalis) is a valuable species found in Northern Iran's Alborz region.
Illegal logging by villagers threatens Zarbin cypress stands, particularly in the Roodbar area, leading to a scarcity of mature trees (DBH>30 cm).

Purpose of the Study:

To develop a species volume table for Zarbin cypress in the Roodbar area to facilitate accurate stand volume calculations.
To introduce and validate a novel, more efficient method for measuring tree height in forest inventories.

Main Methods:

Line sampling was employed to collect data on Zarbin cypress stands.
Form factors were estimated to construct the species volume table.
A new tree height measurement technique was developed, focusing on the distance from the observer's eye level to the tree butt.

Main Results:

A species volume table for Zarbin cypress in the Roodbar area was successfully prepared.
The new tree height measurement method proved to be easier, faster, and more accurate than traditional methods, especially for young conifers.

Conclusions:

The developed species volume table provides a crucial baseline for assessing Zarbin cypress stand volumes in the Roodbar region.
The innovative tree height measurement technique enhances the efficiency and accuracy of forest inventory operations, contributing to better forest management practices.