Articles by Author: C Malan

Search results for C Malan

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  1. BOOK REVIEWS

    Item type: Journal Article • Journal: South African Forestry Journal
  2. Genetic Variation in Some Growth and Wood Properties among 18 Full-sib Families of South African <em>Grown Eucalyptus grandis:</em> A Preliminary Investigation

    Item type: Journal Article • Journal: South African Forestry Journal
    Estimates of the genetic parameters for a number of tree and wood properties were obtained using 18 controlled pollinated families selected for rapid growth from a 9-year-old progeny trial consisting of 71 controlled pollinated families and one commercial control. Significant...
  3. Wood Property Variation in Six <em>Pinus radiata</em> (D. Don) Trees Grown in the Jonkershoek State Forest

    Item type: Journal Article • Journal: South African Forestry Journal
    The sources of variation, their relative contribution to the total and random variation, and the general pattern of variation were investigated for total ring width, latewood width, latewood percentage, grain angle, basic density and fibre length.
  4. Direct Gamma Ray Densitometry of Wood

    Item type: Journal Article • Journal: South African Forestry Journal
    Wood density was determined in various wood species representing a wide range of densities using 60 KeV collimated soft gamma radiation from an Americium241 energy source. In the samples examined wood mass attenuation coefficients varied from 0,170 to 0,210 cm2g...
  5. Variation, Association and Inheritance of Juvenile Wood Properties of <em>Eucalyptus grandis</em> Hill ex Maiden with Special Reference to the Effect of Rate of Growth

    Item type: Journal Article • Journal: South African Forestry Journal
    In South Africa existing knowledge on the properties of the juvenile wood of Eucalyptus grandis, their variation and intercorrelation is seriously lacking and not in accordance with the species commercial importance. Such information is important because of the fact that...
  6. Effect of Initial Spacing and Thinning on Some Wood Properties of <em>Eucalyptus grandis</em>

    Item type: Journal Article • Journal: South African Forestry Journal
    A study was made of the effect of thinning intensity on wood density and some wood anatomical properties and their within-tree variation patterns, as well as the extent to which the development of growth-stress splits in logs and sawn boards...
  7. Dating of <em>Pterocarpus angolensis</em> Trees

    Item type: Journal Article • Journal: South African Forestry Journal
    Samples of Pterocarpus angolensis collected in KaNgwane were dated by means of (a) the C14 dating method, (b) visual ring counting, (c) counting of rings on X-ray photographs taken from the transverse surfaces of samples cut from tree boles, and...
  8. The Wood Properties and Qualities of Three South African-Grown Eucalypt Hybrids

    Item type: Journal Article • Journal: South African Forestry Journal
    Hybridisation is becoming an increasingly important technique in tree breeding to improve yields, adaptability and wood quality. In this study, sample material from crosses of Eucalyptus grandis with E. tereticornis, E. camaldulensis and E. urophylla established on sites of which...
  9. The Wood Properties and Quality of <em>Pinus pringlei</em> Shaw and <em>P. greggii</em> Engel. Compared with that of <em>P. patula</em> and <em>P. elliottii</em> Grown in South Africa

    Item type: Journal Article • Journal: South African Forestry Journal
    P. pringlei produces an attractive wood of a uniformly pale-brown colour due to its comparatively inconspicuous growth rings. It has a fine texture and has an average density similar to that of P. elliottii but is considerably less variable, especially...