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An Olfactometer Testing the Olfactory Response of the Japanese Horntail Urocerus japonicus to Volatiles
α-pinene attraction olfactometer Urocerus japonicus volatiles
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2009/8/24
An olfactometer was developed to analyze the olfactory response of the Japanese horntail, Urocerus japonicus, adult to volatile constituents of trees. The olfactometer consists of T-shaped branched tu...
The Effects of Thinning on the Spatial Distribution of Trees in an Old Chamaecyparis obtusa Plantation Quantitative Analysis Using the L-Function
long rotation old-aged stand spatial statistics tree spacing
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2009/8/24
We investigated changes in the spatial distribution of trees in a 90-year-old Chamaecyparis obtusa plantation owned by Hieizan Enryakuji Temple using the L-function. The plantation is an example of lo...
Estimation of Spatial Variation of Soil CO2 Efflux from Tree Index
soil CO2 efflux spatial variation soil temperature soil moisture
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2009/8/24
To measure spatial variation in soil CO2 efflux in a secondary beech forest in northern Japan, we took measurements five times over two years at 49 sampling points in a 35 m×35 m grid using a closed c...
Estimation of Forest Resource Conditions in Larix kaempferi Stand Combining High Resolution Digital Aerial Photography and DTM by LiDAR Data
digital aerial photograph high resolution Larix kaempferi remote sensing tree crown
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2009/8/24
The purpose of this research was to develop high resolution digital aerial photography to estimate fundamental stand parameters (number of standing trees, mean tree height, stem volume) in a Larix kae...
A Test of Visual Assessment of Crop Size of Quercus crispula Using a Binocular
natural regeneration Asiatic black bear masting power function reproduction
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2009/8/24
To develop a method to estimate crop size of oak trees (Quercus crispula) with least labor and as quickly as possible, the method proposed by Koenig et al. (1994) was tested in temperate forests of Ja...
A Defect Estimation Method within a Trunk Based on Wavelet Analysis by Diagnostic Slapping Sounds
trunk defect diagnosis wavelet analysis slapping sound
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2009/8/24
It has been known that there is a relationship between wind-falls of trees and such defects as cavities or decays within their trunks. However, up to now, no such methods or devices have been develope...