Articles by Author: J Booysen

Search results for J Booysen

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  1. The regrowth and utilisation of carbohydrate reserves of <em>eragrostis cur vula</em> after different frequencies of defoliation

    The regrowth and utilisation of carbohydrate reserves of <em>eragrostis cur vula</em> after different frequencies of defoliation

    Eragrostis curvula in pots was cut every 2, 3, 4, 6, or 12 weeks, for 12 weeks. Regrowth and the recovery of total available carbohydrates (TAC) in the next 7 weeks was measured weekly.
  2. The influence of clipping frequency on reserve carbohydrates and regrowth of <em>Eragrostis curvula</em>

    The influence of clipping frequency on reserve carbohydrates and regrowth of <em>Eragrostis curvula</em>

    Increasing the frequency of clipping over a 12 week period resulted in decreasing root and stubble weight at the end of the 12 week period. During the regrowth period, following the clipping treatment, the aerial dry matter production was found...
  3. Grazing and grazing management terminology in southern Africa

    Grazing and grazing management terminology in southern Africa

    In order to avoid misunderstanding arising in discussions and from the literature on grazing management problems in Southern Africa a proposed list of terms and definitions to cater for all grazing situations and concepts is presented. The terms are classified...
  4. The delineation of plant communities in relatively homogenous grassland

    The delineation of plant communities in relatively homogenous grassland

    A relatively homogenous area of grassland was sampled by means of 2204 systematically place ½m2 quadrats for the presence or absence of all vascular plants this data was processed by the method of normal association analysis which provided an hierarchical...
  5. A tensilmeter for the measurement of the tensile strength of grass leaf blades<sup>1</sup>

    A tensilmeter for the measurement of the tensile strength of grass leaf blades<sup>1</sup>

    The design and construction of a simple and inexpensive tensilimeter for measuring the tensile properties of grass leaves is described. The instrument was found to give reliable results and was used to estimate the variation in the breaking force and...
  6. The tensile properties of ten indigenous grasses<sup>1</sup>
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    The tensile properties of ten indigenous grasses<sup>1</sup> <sup>1</sup>

    A study of the tensile properties of the leaves of ten indigenous grasses as measured in terms of their breaking force and their breaking tension has shown that grasses differ from one another in these properties. In general the tensile...
  7. A study of the factors influencing the breaking tension of the leaves of various grasses<sup>1</sup>

    A study of the factors influencing the breaking tension of the leaves of various grasses<sup>1</sup>

    The relationship between the breaking tension of the leaves of several indigenous grasses and various possible physical and chemical determinants of this property was examined by means of a multiple linear regression analysis. In this analysis a distinction was drawn...