Articles by Author: R N Glen

Search results for R N Glen

We found 15 results for you
  1. BOOK REVIEWS

    Item type: Journal Article • Journal: South African Forestry Journal
  2. Facilitation of Spatial Orientation Among Adolescents from a Disadvantaged Background

    Facilitation of Spatial Orientation Among Adolescents from a Disadvantaged Background

    Item type: Journal Article • Journal: Journal of Psychology in Africa
    The study investigated structural and shape recognition in two to three dimensions by adolescents from a historically disadvantaged neighbourhood. Data on the spatial orientation of grade eight learners in a specific school were collected using specifically adjusted and developed tests...
  3. The Response of Pinus radiata and Pinus pinaster to N, P and K Fertilizers Applied At Planting

    Item type: Journal Article • Journal: South African Forestry Journal
    P. radiata and P. pinaster fertilized with N. P and K at planting responded positively to phosphate and negatively to potassium. Nitrogen increased the height growth of P. radiata during the first year only. Significant volume increases when the fertilizer...
  4. Comparison of the tolerance of <em>Pinus patula</em> seedlings and established trees to infection by <em>Fusarium circinatum</em>

    Comparison of the tolerance of <em>Pinus patula</em> seedlings and established trees to infection by <em>Fusarium circinatum</em>

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Since the first appearance of Fusarium circinatum in South Africa in 1990, foresters have been challenged with poor field survival of Pinus patula seedlings at establishment. One of the best long-term solutions is to improve the genetic tolerance of P...
  5. Innovation and agricultural exports: the case of sub-Saharan Africa

    Innovation and agricultural exports: the case of sub-Saharan Africa

    The multifaceted nature of agricultural innovation makes it evident that technological, industrial, human and economic factors define and redefine agricultural innovation within new cultural and technological contexts. Juxtaposing the African condition to the earlier understanding of the cross-cultural dimensions of...
  6. Saliva fractions from South African Russian wheat aphid biotypes induce differential defence responses in wheat

    Saliva fractions from South African Russian wheat aphid biotypes induce differential defence responses in wheat

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The Russian wheat aphid (RWA), Diuraphis noxia (Kurdjomov, 1913), is a notorious pest that reduces yield in wheat. Nevertheless, the source of eliciting activity during RWA–wheat interaction has not been established. This paper reports on the isolation of eliciting activity...
  7. Diversity and identification of fungi associated with needles of <em>Pinus radiata</em> in Tasmania

    Diversity and identification of fungi associated with needles of <em>Pinus radiata</em> in Tasmania

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Needle fungi have been extensively studied in conifers but rarely in Pinus radiata. Previous studies of P. radiata have been based on fungal isolation and not direct PCR detection from needles. This research was a component of a study examining...