Articles by Author: J E Danckwerts

Search results for J E Danckwerts

We found 30 results for you
  1. Animal production off grassveld

    Animal production off grassveld

    Potential grassland constitutes 37% of South Africa, 45% and 55% of this being sweet and sour respectively. The major factors limiting animal production in the sweetveld are a reduction in the grazing capacity of the veld through veld deterioration, and...
  2. Assessment of the disc pasture meter on natural veld in the false thornveld of the eastern province

    Assessment of the disc pasture meter on natural veld in the false thornveld of the eastern province

    The use of the standard disc pasture meter is found to be a reliable technique for estimating the yield of the densely tufted grass swards found in the False Thornveld of the Eastern Province. It compares favourably with traditional methods...
  3. Maximum profitability as a criterion for optimisation of utilisation intensity

    Maximum profitability as a criterion for optimisation of utilisation intensity

    A technique is proposed for the formulation of a factor/product relationship between grazing days/hectare (ha) and liveweight gain/ha in order to relate maximum profitability to intensity of herbage utilisation in beef production systems in the False Thornveld of the Eastern...
  4. Short term effects of defoliation on herbage yield at three veld condition sites in the false thornveld of the eastern province

    Short term effects of defoliation on herbage yield at three veld condition sites in the false thornveld of the eastern province

    All combinations of three frequencies and three intensities of defoliation were applied at three veld condition sites in the False Thornveld of the Eastern Province during a single growing season. Treatment effects were recorded during the season of application, and...
  5. The rate of herbage disappearance during periods of occupation in rotational grazing systems

    The rate of herbage disappearance during periods of occupation in rotational grazing systems

    The rate of herbage depletion during a period of occupation in a rotational grazing system is dependent on daily intake of animals which in turn is a function of the quality and the quantity of the forage available. When herbage...
  6. The grazing capacity of Sweetveld: 1 A technique to record grazing capacity

    The grazing capacity of Sweetveld: 1 A technique to record grazing capacity

    A technique is proposed for measuring the grazing capacity of sweet grassveld. The suggested procedure is to record the parameter on plots simulating individual camps in rotational grazing systems. This allows considerably smaller experimental areas to be used than in...
  7. The grazing capacity of sweetveld: 2. A model to estimate grazing capacity in the false thornveld of the eastern cape

    The grazing capacity of sweetveld: 2. A model to estimate grazing capacity in the false thornveld of the eastern cape

    The relations between grazing capacity and three independent variables were investigated in the False Thornveld of the Eastern Cape. The variables were veld condition, rainfall and the density of woody species. These relations were used to develop a preliminary model...
  8. Herbaceous species preference by cattle in the false thornveld of the Eastern Cape

    Herbaceous species preference by cattle in the false thornveld of the Eastern Cape

    Herbaceous species preference by cattle was studied at two sites of different botanical composition in the False Thornveld of the Eastern Cape. Of the grasses under observation, Themeda triandra was the most preferred species. Animals continued to graze selectively even...
  9. The role of <em>acacia karroo</em> in the false thornveld of the eastern cape <em>die rol van</em> acacia karroo <em>in die skyn‐doring veld van die oos‐kaap</em>

    The role of <em>acacia karroo</em> in the false thornveld of the eastern cape <em>die rol van</em> acacia karroo <em>in die skyn‐doring veld van die oos‐kaap</em>

    An investigation was undertaken to determine the relationship between tree density and grass production, tree density and overall feed production and between tree density and animal production. It was found that grass production does not decrease linearly with increasing tree...
  10. The production potential of an <em>acacia karroo</em> community utilized by cattle and goats

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    An investigation was undertaken to determine the relationship between bush density and animal production/ha as well as between bush density and profitability/ha. Boer goat farming was found to be more profitable in the short term than beef ranching. The best...