Articles by Keyword: Growth Stresses

Search results for Growth Stresses

We found 324 results for you
  1. 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...
  2. 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...
  3. Clonal differences in log end splitting in <em>Eucalyptus grandis</em> in relation to age, parent performance, growth rate and wood density in two even-aged trials in Mpumalanga, South Africa

    Clonal differences in log end splitting in <em>Eucalyptus grandis</em> in relation to age, parent performance, growth rate and wood density in two even-aged trials in Mpumalanga, South Africa

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    This paper discusses the juvenile–mature correlation of log end splitting among Eucalyptus grandis clones from two trials and how differences in splitting relate to differences in wood density, pith-to-bark gradient and growth rate. Two approximately 20-year-old Eucalyptus grandis clonal trials...
  4. The Application of Inorganic Fertilisers to Conditioned <em>Pinus radiata</em> Prior to Lifting as a Means of Improving Root Growth Capacity

    Item type: Journal Article • Journal: South African Forestry Journal
    A modified root growth capacity technique was used to evaluate the effect of the application of different types and quantities of fertilisers on the root growth capacity (RGC) of conditioned Pinus radiata seedlings. The experiment indicates that 0,05 g N...
  5. Role of Eucalypt Plantations in Timber Supply and Forest Conservation in Sub-Saharan Africa

    Item type: Journal Article • Journal: South African Forestry Journal
    The role of eucalypt plantations in timber supply and forest conservation in Sub-Saharan Africa was investigated. The annual destruction of 11,5 million ha of tropical forest is highlighted, the various causes indicated and the controversy whether fast-growing plantations and woodlots...
  6. Root-shoot Growth Periodicity in <em>Ocotea bullata</em>

    Item type: Journal Article • Journal: South African Forestry Journal
    Periodicity in leaf fall, and in the growth of roots and shoots of Ocotea bullata was studied. Leaf fall of canopy trees was measured to establish the natural phenological pattern of mature trees. Shoot growth was measured on potted plants...
  7. Regeneration Procedures of <em>Pinus radiata</em> in the Southern Cape Province

    Item type: Journal Article • Journal: South African Forestry Journal
    The present paper is a continuation of the series dealing with the regeneration of Pinus radiata in the southern Cape Province. The study deals with post planting mortality and growth in response to the experimental treatments and planting site environment...
  8. Modelling Diameter and Height Distributions through Dispersion Statistics in Even-aged Pine Plantations

    Item type: Journal Article • Journal: South African Forestry Journal
    Diameter and height distribution recovery, in combination with standlevel projection modelling, is generally used in Southern Africa for predicting growth and yield in even-aged pine plantations. A different approach for modelling diameter and height distributions for five pine species commercially...
  9. Field Performance of Micropropagated and Macropropagated <em>Eucalyptus</em> Hybrids

    Item type: Journal Article • Journal: South African Forestry Journal
    Plantlets derived, via both in vitro micropropagation and from rooted cuttings, from seven different Eucalyptus hybrid genotypes were assessed for their field performance in Kwambonambi, KwaZulu Natal. Tree survival, height, mean annual increment, diameter at breast height and size uniformity...
  10. The Blackwood Group System: its relevance for sustainable forest management in the southern Cape

    Item type: Journal Article • Journal: South African Forestry Journal
    The invasion status of Australian blackwood, Acacia melanoxylon, is assessed against its value as a commercial tree in the southern Cape forests. The species was introduced from Australian rain forests and planted extensively in the southern Cape forests since 1909...