Articles by Author: N F G Rethman

Search results for N F G Rethman

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  1. The Possibilities of a Super Absorbent Polymer (Terrasorb) for Improved Establishment, Growth and Development of Oldman Saltbush (<em>Atriplex nummularia</em>) Seedlings

    Item type: Journal Article • Journal: South African Forestry Journal
    Oldman saltbush (OMS) is susceptible to moisture stress during the seedling phase in spite of being very drought resistant when mature. Terrasorb, a starch based polymer with a high water holding capacity, was premixed with two soil types and its...
  2. The influence of time of defoliation on the vigour of a tall grassveld sward in the next season<sup>1</sup>

    The influence of time of defoliation on the vigour of a tall grassveld sward in the next season<sup>1</sup>

    The time of defoliation exercised a significant influence on both the production of the sward and the regrowth potential of Themeda triandra in the season subsequent to treatment. In the spring following treatment the regrowth potential of T. triandra and...
  3. The seasonal growth patterns of a Tall Grassveld sward<sup>(1)</sup>

    The seasonal growth patterns of a Tall Grassveld sward<sup>(1)</sup>

    The growth patterns of a Tall Grassveld sward measured with an inclined point and by clipping and weighing were dominated by moisture conditions except in winter when temperature was limiting. The inclined point as a method of determining yield which...
  4. Overseeding of <em>Eragrostis curvula</em> on north‐eastern Sandy Highveld

    Overseeding of <em>Eragrostis curvula</em> on north‐eastern Sandy Highveld

    A small plot trial to investigate the possibilities of directing changes in the botanical composition of fertilized veld by oversowing demonstrated the potential of this technique for the establishment of improved pastures in non‐arable situations. The improved return on fertilization,...
  5. Foggage value of kikuyu (<em>pennisetum clandestinum</em> hochst. ex chiov.)

    Foggage value of kikuyu (<em>pennisetum clandestinum</em> hochst. ex chiov.)

    Investigations to determine whether frosted kikuyu could supply better quality foggage than natural pasturage in sourveld areas during the winter months revealed that this grass was characterized by a crude protein content of 8–10% in the winter months. The performance...
  6. Influence on a North‐Eastern Sandy Highveld sward of winter utilization by sheep

    Influence on a North‐Eastern Sandy Highveld sward of winter utilization by sheep

    North‐Eastern Sandy Highveld was utilized selectively by sheep grazing alone in winter with a supplementary lick. Winter utilization in four consecutive years had no detrimental effect on production, cover or seed production but care should be exercised in recommending this...
  7. Elevation of shoot‐apices of two ecotypes of <em>Themeda triandra</em> on the Transvaal Highveld

    Elevation of shoot‐apices of two ecotypes of <em>Themeda triandra</em> on the Transvaal Highveld

    In a series of investigations from 1965 to 1970 on the Transvaal Highveld it was found that trie elevation of shoot apices of two ecotypes of Themeda triandra was affected by season, ecotype and treatment. The absence of defoliation increased...
  8. Preliminary results on species selection by animals on sour grassveld

    Preliminary results on species selection by animals on sour grassveld

    A study of species selection by cattle under a system of controlled selective grazing using wheel‐point surveys and fistulated animals has demonstrated that both techniques provide valuable information on the preference shown for such species as Andropogon amplectens, Eulalia villosa,...
  9. The utilization of <em>eragrostis curvula</em> and <em>pennisetum clandestinum</em> pastures for growing out and finishing young beef steers

    The utilization of <em>eragrostis curvula</em> and <em>pennisetum clandestinum</em> pastures for growing out and finishing young beef steers

    Results obtained from three observation trials to assess the feasibility of utilizing Eragrostis and kikuyu with young beef steers are presented. Although both grasses were characterized by a high grazing capacity the performance of livestock, on an individual basis, was...
  10. The implications, with respect to production and nutritional value, of different stages of harvesting <em>eragrostis curvula</em> hay

    The implications, with respect to production and nutritional value, of different stages of harvesting <em>eragrostis curvula</em> hay

    A small plot cutting trial conducted over a five year period has demonstrated that dry matter production and crude protein content are negatively related when different frequencies of defoliation are applied. Frequent harvesting at a leafy stage produced the most...