Comparison of Trees Growth Measurement Using Diameter Tape and Manual Band Dendrometer

Abstract

The objective of this study was to compare diameter tree growth measurement by using diameter tape and manual band dendrometer. Selected trees composed of 2 species of Schleichera oleosa and Lagerstroemai duperreana which diameter at breath heights (DBH) were measured every two months for a year. The statistical hypothesis test (T-test) was used – to analyze the different of tree growth data by using two instruments. The finding of study were that S. oleosa diameters measured by using diameter tape and manual band dendrometer were statistically significant different (p<0.05) and L. duperreana diameter were highly statistically significant different (p<0.01). Advantages of growth measurement using diameter tape were fast measurement, small and easy to carry whereas its disadvantage was required a time in measurement and not suitable for measuring in a short period. Advantages of measurement using manual band dendrometer were easy for re-measurement at the same position on the stem and could be measured precisely whereas its disadvantage was the error measurement due to the distorted instruments.