Articles by Author: P A Pieterse

Search results for P A Pieterse

We found 47 results for you
  1. Floristic and Structural Composition of Wonderwoud Forest in the Wolkberg, North-Eastern Transvaal

    Item type: Journal Article • Journal: South African Forestry Journal
    The closed, evergreen forest of 450 ha was studied by means of a survey of 55 circular plots of 0,04 ha, distributed in a grid pattern. TWINSPAN classification separated the forest into four stand types: Olea capensis macrocarpa—Xymalos monospora—Syzygium gerrardii...
  2. A comparison of highveld fodders and fodder flows for growing out long yearling steers

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    A fodder flow/animal experiment 40,8 ha in extent (7,5 ha irrigated), with 19 paddocks, was carried out over a two and a half year period.
  3. Preference rating and other characteristics of a few promising <em>eragrstos curvula</em> ecotypes as determined by grazing sheep

    Preference rating and other characteristics of a few promising <em>eragrstos curvula</em> ecotypes as determined by grazing sheep

    Eragrostis curvula cv. Ermelo, as control, was tested against several ecotypes at two localities in the Transvaal Highveld in respect of dry matter yield, percentage utilization, preference rating and herbage quality, using sheep mainly, as tester animals. The ecotypes were:...
  4. Produksie en kwaliteit van ‘n aantal grasspesies in die <em>Combretum‐</em>veld van noord‐transvaal

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Die produksie en kwaliteit van vyf spesies (Themeda triandra, Heteropogon contortus, Digitaria eriantha var. pentzii, Schmidtia pappophoroides en Eragrostis rigidior) is by verskillende frekwensies van ontblaring op ontbosde en onontbosde bosveld gemeet. In die daaropvolgende jaar is intensiteit bygebring met...
  5. Die invloed van die beskikbaarheid van nutriënte en ontblaringsbestuur op die produksie van <em>digitar1a Eriantha</em> variëteit <em>Eriantha</em>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Die invloed van verskillende peile van stikstof (N), fosfaat (P) en kalium (K) op die produksie en kwaliteit van Digitaria eriantha var. eriantha is in sandkultuur ondersoek. Verder is daar ook gekyk na die invloed van drie intensiteite van ontblaring...
  6. Groei en produksie van ‘n aanal aangeplante weidings onder beweiding

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Die groei en produksie onder beweiding van ‘n aantal aangeplante weidings is met behulp van die verskilmetode bepaal. Uit die data verkry in die proef is dit duidelik dat indien daar besproeiingswater beskikbaar is, groen materiaal dwarsdeur die jaar voorsien...
  7. ‘n Vergelyking van wei‐ en voergewasse vir die produksie van slaglammers in die Pretoria‐ Witwatersrand‐Vereeniging(PWV)‐gebied

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    A comparison of pasture and fodder crops for the production of slaughter lambs in the Pretoria‐Witwatersrand‐Vereeniging (PWV) area. A number of pasture and fodder species were evaluated for the production of mutton with weancr lambs. Animal performance and meat production...
  8. Die evaluering van vier <em>Eragrostis curvula</em> ekotipes met weidende skape

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The evaluation of four Eragrostis curvula ecotypes with grazing sheep. Four ecotypes of Eragrostis curvula, namely, Cape Province 5, Ermelo, Pearston 204 and Makwassie 150 were evaluated in a grazing trial with sheep, at three stocking rates, during two growing...
  9. ‘n Tegniek om beskikbare bogrondse fitomassa van graspolle in ontblaring‐studies te kwantifiseer*

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    A technique to quantify available above‐ground phytomass of grass tufts in defoliation studies is described. Highly significant correlations were found between tuft volume and above‐ground phytomass in eighteen out of twenty‐two species that were examined. Tuft volume can therefore be...
  10. An effective technique for breaking the seed dormancy of <em>Acacia longifolia</em>

    An effective technique for breaking the seed dormancy of <em>Acacia longifolia</em>

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of different pre-treatments on the dormancy of the hard-coated seeds of Acacia longifolia Andr. Willd. was determined. A final germination figure of 100% could be obtained with hot water treatments, acid scarification and manual scarification. However, if germination...