Articles by Keyword: Taper

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  1. Alternative Taper Curve Estimation Methods for <em>Eucalyptus cloeziana</em> (F. Muell.)

    Alternative Taper Curve Estimation Methods for <em>Eucalyptus cloeziana</em> (F. Muell.)

    Item type: Journal Article • Journal: The Southern African Forestry Journal
    Three types of taper estimation methods for Eucalyptus cloeziana were applied and compared by using Zambian and Zimbabwean plantation data. The methods are: (1) Schumacher's taper equation, (2) diameter prediction method and (3) polynomial taper curve. The Schumacher's taper equation...
  2. Variation in Wood Properties of <em>Eucalyptus nitens</em> in a Provenance Trial on the Eastern Transvaal Highveld in South Africa

    Item type: Journal Article • Journal: South African Forestry Journal
    Eucalyptus nitens is one of the four important cold-tolerant eucalypts grown for mining timber and pulpwood on the eastern Transvaal highveld in South Africa. In 1983 an active genetic improvement programme was initiated to improve growth rate, stem form and...
  3. Tree taper models for <em>Cupressus lusitanica</em> plantations in Ethiopia

    Tree taper models for <em>Cupressus lusitanica</em> plantations in Ethiopia

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    To provide a taper model for planning and management of Cupressus lusitanica plantations in Ethiopia, seven taper models were compared. Four performance indicator statistics were used for comparing the models in their ability to estimate tree diameter, and total and...
  4. Effect of weeding and fertilisation on bark thickness and stem form of seven pine species on a low-elevation site at Usutu, Swaziland

    Effect of weeding and fertilisation on bark thickness and stem form of seven pine species on a low-elevation site at Usutu, Swaziland

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    On a low-elevation site at Usutu alternative species to Pinus elliottii, the species recommended in the past for such sites, were planted to evaluate growth differences. At rotation age, destructive stem profile analyses were conducted on some of the trees...
  5. Estimation of taper rates and volume of smaller-sized logs in spotted gum saw timber plantations in Southeast Queensland, Australia

    Item type: Journal Article • Journal: Southern Hemisphere Forestry Journal
    Spotted gum (Corymbia citriodora subsp. variegata) is a popular tree species for hardwood saw timber plantations in Southeast Queensland (SEQ), Australia. In many parts of the world, logs up to 10cm top diameter are considered to be merchantable logs and...
  6. Volume estimation of <em>Cryptomeria japonica</em> logs in southern Brazil using artificial intelligence models

    Volume estimation of <em>Cryptomeria japonica</em> logs in southern Brazil using artificial intelligence models

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    This study aimed to test taper functions and artificial intelligence (AI) models in order to estimate merchantable volumes of Japanese cedar (Cryptomeria japonica) trees in a homogenous plantation in southern Brazil. A total of 30 individuals were rigorously scaled and...