Search
Search results for
We found
7 results for you
-
Comparing normal, lognormal and Weibull distributions for fitting diameter data from Akashmoni plantations in the north-eastern region of Bangladesh
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: I Kayes --- Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Bangladesh JC Deb --- Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Bangladesh P Comeau --- School of Forest Science and Management, Canada S Das --- Department of Statistics, School of Physical Sciences, BangladeshStatistical probability density functions are widely used to model tree diameter distributions and to describe stand structure. The objective of this study was to compare the performance of normal, logarithmic-normal and three-parameter Weibull distributions for fitting diameter data from Akashmoni... -
Stand structure and regeneration of harvested Araucaria araucana–Nothofagus stands in central Chile
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rafael M Navarro-Cerrillo --- DendrodatLab, Departamento de Ingeniería Forestal, Spain Fernando Olave --- Corporación Nacional Forestal, Chile Francisco Moreno --- DendrodatLab, Departamento de Ingeniería Forestal, Spain Sergio de Miguel --- Faculty of Science and Forestry, Finland Margarita Clemente --- Departamento de Ciencias y Recursos Agrícolas y Forestales, SpainIn this study we examined the current structure and regeneration status of mixed Araucaria araucana–Nothofagus spp. stands that had been logged 20 years ago. We measured stand density of saplings, juvenile and adult trees, as well as stand basal area... -
Testing the suitability of the Nepal-Somers stand table projection method for Eucalyptus grandis plantations in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: J Corral-Rivas --- Facultad de Ciencias Forestales, México S Sánchez Orois --- , Germany H Kotze --- , South Africa K von Gadow --- , GermanyThis study presents an application of a stand table projection method for varying stand densities of Eucalyptus grandis in South Africa. The projections of diameter at breast height (dbh) class frequencies are compatible with future values of basal area and... -
Percentile-based Weibull diameter distribution model for Pinus kesiya stands in Benguet province, Philippines
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Roscinto Ian C Lumbres --- Warm Temperate and Subtropical Forest Research Center, Republic of Korea Young Jin Lee --- Department of Forest Resources, Republic of KoreaThis study was conducted to develop a diameter distribution model for Pinus kesiya stands in Benguet province, Philippines, using the percentile-based Weibull model. The performance of the different equations was examined using evaluation statistics such as the fit index (FI)... -
Characterising the diameter distribution of Sal plantations by comparing normal, lognormal and Weibull distributions at Tilagarh Eco-park, Bangladesh
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Jiban Chandra Deb --- Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Bangladesh Md Habibur Rahman Salman --- Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Bangladesh Md Abdul Halim --- Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Bangladesh Md Qumruzzaman Chowdhury --- Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Bangladesh Anindita Roy --- Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, BangladeshFor many years foresters have been using statistical probability density functions to describe and characterise stand structure. Predicting the current and future yields of a stand is essential for successful stand and timber management. Implicit prediction of current yield is... -
Applications of small-scale, stand-alone wind energy conversion systems in rural Cross River State, Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Fidelis I. Abam --- Energy, Exergy and Environment Research Group (EEERG), Mechanical Engineering Department, Nigeria Olayinka S. Ohunakin --- The Energy and Environment Research Group (TEERG), Department of Mechanical Engineering, NigeriaThe study presents the wind energy potential (WEP) for six locations in Cross River State, Nigeria. The objective of the study was to assess the WEP of the selected sites for electricity generation, using small size wind energy conversion systems... -
Analysis of offshore wind energy potential for power generation in three selected locations in Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mamman Rabiu Onoruoiza --- , Nigeria Oyewole Adedipe --- , Nigeria Sunday Albert Lawal --- , Nigeria Oluwafemi Ayodeji Olugboji --- , Nigeria Victor Chiagozie Nwachukwu --- , NigeriaThe rise in the global carbon footprint arising from fossil fuel sources has necessitated the need to explore sustainable and eco-friendly sources of energy. Wind as a source of renewable energy has been underutilized in Nigeria and this study is...