Articles by Keyword: Shrub Encroachment

Search results for Shrub Encroachment

We found 26 results for you
  1. Water utilization patterns around isolated <em>Acacia karroo</em> trees in the False Thornveld of the eastern Cape

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The effect of various vegetation treatments on two soil moisture regimes (i.e. the proportion of the experimental period where the soil had sufficient water for: (a) growth, and (b) to keep the plants turgid in the vicinity of experimentally isolated...
  2. Control measures for the encroacher shrub <em>Seriphium plumosum</em>

    Control measures for the encroacher shrub <em>Seriphium plumosum</em>

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Seriphium plumosum encroachment in South Africa has converted extensive areas of grassland into less productive shrubland–grassland, but its control is not being seriously addressed at present. Therefore, the short-term response of S. plumosum to different applications of nitrogen (N), phosphate...
  3. Do we understand the causes of bush encroachment in African savannas?

    Do we understand the causes of bush encroachment in African savannas?

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Bush encroachment affects the agricultural productivity and biodiversity of 10–20 million ha of South Africa. Many people believe that we understand the causes of bush encroachment. We do not. Many people believe that either fire or heavy grazing by domestic...
  4. Effects of land tenure, geology and topography on vegetation and soils of two grassland types in South Africa

    Effects of land tenure, geology and topography on vegetation and soils of two grassland types in South Africa

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    A national degradation audit conducted in South Africa in the late 1990s found communal land tenure to be the strongest predictor of vegetation and soil degradation, while abiotic factors such as geology, slope and aspect were also correlated with degradation...
  5. The influence of <em>Pechuel-Loeschea leubnitziae</em> (wild sage) on grass sward and soil seed bank composition

    The influence of <em>Pechuel-Loeschea leubnitziae</em> (wild sage) on grass sward and soil seed bank composition

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Soil seed banks provide not only a historical record of vegetation composition but also the potential for post-disturbance revegetation. Pechuel-Loeschea leubnitziae (wild sage) is a multistemmed, aromatic shrub, occurring in Namibia, Botswana, Swaziland, Zimbabwe and the northern regions of South...
  6. A century of woody plant encroachment in the dry Kimberley savanna of South Africa

    A century of woody plant encroachment in the dry Kimberley savanna of South Africa

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Woody plant encroachment is frequent in dry savannas. Grazing is often considered to be a major cause of encroachment in dry savannas because grasses are removed by livestock, leaving bare areas for trees to colonise in wetter years. Earlier experiments...
  7. Effect of fire intensity on the grass and bush components of the Eastern Cape thornveld

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Fire intensity is an important component of the fire regime and its effect on the grass sward and bush were investigated in the Eastern Cape thornveld. Research indicated that fire intensity had no effect on the recovery of grass after...
  8. Veld management in the communal areas of Ciskei

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Veld management in Ciskei is based predominantly on a communal land tenure system, and livestock is produced under a ‘Group Ranch’ system. Stocking rates are excessively high and consequently veld degradation is severe, resulting in a lowered carrying capacity and...
  9. The economic implications of bush encroachment on livestock farming in rangelands of Uganda

    The economic implications of bush encroachment on livestock farming in rangelands of Uganda

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    The objective of this study was to assess the economic implications of shrub encroachment on pastoral rangeland productivity in Mbarara district, in south western Uganda. Sixty pastoral households were surveyed, thirty of which were grazing on cleared farms (with less...
  10. Effect of long-term exclusion of fire and herbivory on the soils and vegetation of sour grassland

    Effect of long-term exclusion of fire and herbivory on the soils and vegetation of sour grassland

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    The effect of long-term exclusion of fire and herbivory, as mediated by aspect, on soils and the structure, composition, and diversity of vegetation was investigated in Döhne Sourveld (34 years), Piet-Retief Sourveld (45 years) and Southern Tall Grassveld (49 years)...