Articles by Author: Clarissa Potgieter

Search results for Clarissa Potgieter

We found 48 results for you
  1. The effect of canola (<em>Brassica napus</em>) as a biofumigant on soil microbial communities and plant vitality: a pot study

    The effect of canola (<em>Brassica napus</em>) as a biofumigant on soil microbial communities and plant vitality: a pot study

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Canola (Brassica napus) may be incorporated into soil as a biofumigant for control of pathogens such as Sclerotinia sclerotiorum. Yet, the effect of biofumigants on natural microbial communities required to maintain soil functions is still unclear. A pot experiment with...
  2. Fire behaviour in the Kruger National Park

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Fire research in the Kruger National Park has largely been focussed on the effect of the season and frequency of burning on the vegetation. Very little information is available on the effect of fire behaviour and in particular fire intensity,...
  3. Estimating grass fuel loads with a disc pasture meter in the Kruger National Park

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The major portion of the fuel load in the savanna areas comprises surface fuels in the form of the standing grass sward. The disc pasture meter was successfully calibrated for estimating grass fuel loads in the main landscapes of the...
  4. Rol van tekorte aan sekere makro-elemente by verdraagsaamheid van mielies (<em>Zea mays</em> L.) teenoor atrasien

    Rol van tekorte aan sekere makro-elemente by verdraagsaamheid van mielies (<em>Zea mays</em> L.) teenoor atrasien

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die verdraagsaamheid van mieliesaailinge (Zea mays L. kv SSM2041) teenoor atrasien is in 'n glashuis ondersoek. Plante is in potte gekweek, in voedingsoplossings met tekorte aan sekere makro-elemente. Atrasien in die voedingsoplossings is periodiek bepaal met behulp van hoëdrukvloeistofchromatografie. Tekorte...
  5. An assessment of the variation for stem rust resistance in the progeny of a cross involving the <em>Triticum</em> species <em>aestivum, turgidum</em> and <em>tauschii</em>

    An assessment of the variation for stem rust resistance in the progeny of a cross involving the <em>Triticum</em> species <em>aestivum, turgidum</em> and <em>tauschii</em>

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Accession RL5289 of Triticum tauschii and Triticum turgidum var. durum cv. Cando showed resistance to the prevailing stem rust races of South Africa. RL5289 was crossed with Cando. An amphiploid was produced and crossed with the common wheat line W107...
  6. A technique to evaluate ENSO-based maize production strategies

    A technique to evaluate ENSO-based maize production strategies

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Drought occurs frequently in southern Africa, which causes harm to crop production and food security. Atmospheric and oceanic phenomena such as EL Niño/Southern Oscilation (ENSO) may be used to forecast drought. Crop production strategies could then be adapted to mitigate...
  7. Subjective vitality ratings of three Indian languages in South Africa

    Subjective vitality ratings of three Indian languages in South Africa

    Item type: Journal Article • Journal: South African Journal of Linguistics
    Giles, Bourhis & Taylor se Subjective Vitality Questionnaire is aan Engels-, Gujerati-, Hindi- en Tamil-spre-kers gegee om subjektiewe beoordelings van die lewenskragtigheid van laasgenoemde drie tale te verkry. Die volgende verskille tussen die drie taalgroepe is gevind: Gujerati-sprekers is beoordeel...
  8. Language planning: preferences of a group of South African students

    Language planning: preferences of a group of South African students

    Item type: Journal Article • Journal: South African Journal of Linguistics
    Hierdie studie het die voorkeure van 'n groep Suid-Afrikaanse studente aangaande taalbeplanning deur middel van 'n simulasie-oefening ondersoek. Daar is bevind dat beide Afrikaans- en Engelsmoedertaalsprekers 'n taalbeleid van diversiteit verkies het (dit wil sê Afrikaans, Engels en Xhosa as...
  9. The quantification of grazing capacity from grazing — and production values for forage species in semi-arid grasslands of southern Africa

    The quantification of grazing capacity from grazing — and production values for forage species in semi-arid grasslands of southern Africa

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    The relation between rangeland condition and grazing capacity was determined along a degradation gradient. In studying agronomic values of forage species, the average production per tuft was combined with its grazing preferences, to link grazing values for species in the...
  10. Validation of a Coping Scale in an African Context

    Validation of a Coping Scale in an African Context

    Item type: Journal Article • Journal: Journal of Psychology in Africa
    The research aims were to compile and validate a multi-dimensional coping measure, taking African-centred coping behaviour into consideration. In a pilot study the Setswana-COPE (S-COPE) and the Africultural Coping Systems Inventory (ACSI) were administered to Setswana-speaking participants (N = 274)...