Articles by Keyword: Lt Em Gt Eucalyptus Grandis Lt Em Gt Times Lt Em Gt E Urophylla Lt Em Gt Clonal Populations

Search results for Lt Em Gt Eucalyptus Grandis Lt Em Gt Times Lt Em Gt E Urophylla Lt Em Gt Clonal Populations

We found 175 results for you
  1. Realised genetic gains and estimated genetic parameters of two <em>Eucalyptus grandis</em> × <em>E. urophylla</em> hybrid breeding strategies

    Realised genetic gains and estimated genetic parameters of two <em>Eucalyptus grandis</em> × <em>E. urophylla</em> hybrid breeding strategies

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Conventionally, Eucalyptus grandis × E. urophylla (GU) hybrid material is first tested as seedlings in progeny trials for at least four years before ortets are selected and ramets of the selected ortets are propagated to test in clonal trials. The...
  2. Genetic control of wood density and bark thickness, and their correlations with diameter, in pure and hybrid populations of <em>Eucalyptus grandis</em> and <em>E. urophylla</em> in South Africa

    Genetic control of wood density and bark thickness, and their correlations with diameter, in pure and hybrid populations of <em>Eucalyptus grandis</em> and <em>E. urophylla</em> in South Africa

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Tree diameter under and over bark at breast height (dbh), wood density and bark thickness were assessed on samples from control-pollinated families of Eucalyptus grandis, E. urophylla, E. grandis × E. urophylla and E. urophylla × E. grandis. The material...
  3. Genetic parameters of pure and hybrid populations of <em>Eucalyptus grandis</em> and <em>E. urophylla</em> and implications for hybrid breeding strategy

    Genetic parameters of pure and hybrid populations of <em>Eucalyptus grandis</em> and <em>E. urophylla</em> and implications for hybrid breeding strategy

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    In order to review Sappi Forests' breeding strategy for E. urophylla × E. grandis hybrids, information is required regarding the genetic control of certain traits and the correlations between them. A hybrid seedling progeny trial was planted, comprising material generated...
  4. A comparison of planting and coppice regeneration of <em>Eucalyptus grandis</em> × <em>Eucalyptus urophylla</em> clones in South Africa

    A comparison of planting and coppice regeneration of <em>Eucalyptus grandis</em> × <em>Eucalyptus urophylla</em> clones in South Africa

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Results from two coppice compared to replant trials are presented that originated from clone by site interaction (CSI) trials established on high‑ and low‑productivity sites in subtropical coastal KwaZulu‑Natal, South Africa. After the 84‑month CSI trial measurements were completed the...
  5. The effect of harvesting operations, slash management and fertilisation on the growth of a <em>Eucalyptus</em> clonal hybrid on a sandy soil in Zululand, South Africa

    The effect of harvesting operations, slash management and fertilisation on the growth of a <em>Eucalyptus</em> clonal hybrid on a sandy soil in Zululand, South Africa

    Item type: Journal Article • Journal: The Southern African Forestry Journal
    Harvesting operations during clearfelling and extraction of timber from commercial plantations result in many processes that may affect long-term site productivity such as soil compaction and residue manipulation. The objective of this work was to evaluate the effects of various...
  6. Analysis of differences in field performance of vegetatively and seed-propagated <em>Eucalyptus</em> varieties I: survival and leaf gas exchange

    Analysis of differences in field performance of vegetatively and seed-propagated <em>Eucalyptus</em> varieties I: survival and leaf gas exchange

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    The aim of this study was to compare survival rates and leaf gas exchange of micro- and macro-propagated Eucalyptus grandis × E. nitens, and seed-propagated E. grandis and E. nitens, at a site in Hilton, KwaZulu-Natal, South Africa, where the...
  7. Influence of Soil Organic Matter Content on the Responsiveness of <em>Eucalyptus grandis</em> to Nitrogen Fertiliser

    Item type: Journal Article • Journal: South African Forestry Journal
    It is widely recognised that the inherent nitrogen (N) mineralisation capacity of a soil is directly related to the organic matter content. Consequently, in estimating the N requirements of Eucalyptus grandis at planting this mineralisation potential must be taken into...
  8. The Relationship between Soil Water Status, Rainfall and the Growth of <em>Eucalyptus grandis</em>

    Item type: Journal Article • Journal: South African Forestry Journal
    Available soil water is recognised as the main factor influencing the growth of commercial plantations in southern Africa. This is of strategic importance as successive rotations of demanding species such as Eucalyptus grandis may be depleting the soil water reserves...
  9. Comparison of <em>Eucalyptus grandis</em> Provenances and Seed Orchards in a Frost Frequent Environment

    Item type: Journal Article • Journal: South African Forestry Journal
    An international provenance trial of Eucalyptus grandis was established in southern Florida in 1980 and measured for growth and frost-tolerance through 8,8 years. The trial compared 20 Australian provenances 1) among themselves and 2) with seed orchard stock from Florida...
  10. 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...