人工林の直径分布をワイプルパラメータa，b，cのみで表現するさい，直径のバラツキが，尺度のパラメータbのみで正確に判断できない欠点があった．本研究は，この欠点を解決するために，先ず，パラメータb，cを用いて直径の標準偏差，変動係数を簡単に計算する方法を提案した．次に，本方法により計算した標準偏差，変数係数を比較すれば，パラメータbがほぼ同じでcが著しく異なる直径分布のバラツキの違いが正確に判断できることを，三つの応用例を示すことにより明らかにした．さらに，パラメータbが異なる直径分布を比較するさいにも，一つの応用例から，直径のバラツキの差は，標準偏差，変数係数を用いて検討しなければならないことを指摘した．森林施業の立場からみると，直径のバラツキの程度を知ることは重要である．したがって，今回提...
This book is an extensive revision and enlargement of a 1986 publication ‘Multipurpose Australian trees and shrubs: lesser-known species for fuelwood and agroforestry’. It is intended as a reference text for all those concerned with selecting and growing trees and shrubs in rural areas of developing countries and in the more tropical parts of Austr...
A numerical analysis of an electron waveguide coupler based on two quantum wires coupled by a magnetically defined barrier is presented with the use of the scattering-matrix method. For different geometry parameters and magnetic fields, tunneling transmission spectrum is obtained as a function of the electron energy. Different from that of conventi...
The energy spectrum and the persistent currents are calculated for a finite-width mesoscopic annulus with radial potential barrier, threading a magnetic flux through the hole of the ring. Owing to the presence of tunneling barrier, the coupling effect leads to the splitting of each radial energy subband of individual concentrical rings into two one...
This paper details changes to the BEAM models, RRYIELD and RRECON, which are two of a series of bioeconomic models developed by the Bioeconomic Agroforestry Modelling (BEAM) project. The RRYIELD model deals with the biophysical components of a rubber-based agroforestry system. It focuses on the changes in output (latex, wood and intercropped annual...
Published in Plant and Soil
The influence of plant species on soil nitrogen (N) dynamics was investigated in lowland Amazonia, Brazil under plantations of tree species with varied phenologies, resource requirements, and chemical characteristics in fine litter. Seasonal N dynamics were studied in replicated stands of Pinus caribaea var. hondurensis Barrett & Golfari, Euxylopho...
Published in New Forests
Effect of removing Acacia mangium overstorey on the growth of underplanted Anisoptera marginata saplings was studied in a mixed tree plantation established on an Imperata cylindrica dominated grassland site in South-Kalimantan, Indonesia. At the time of overstorey removal the Acacia mangium trees were 80 months old (average height 21 m and DBH 20 c...
