Articles by Author: Cl De Beer

Search results for Cl De Beer

We found 32 results for you
  1. Floristiese verskille tussen ekotope in die Potchefstroom distrik<sup>1</sup>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Floristic differences between eeotopes in the Potchefstroom area. Eeotopes are generally used, in the Highveld Region, as a basis for the division of camps when planning a farm. The possible floristic differences which support this ecological approach, as well as...
  2. Habitat preferences of twenty‐three grass species in the Bankenveld

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Some grass species occur more frequently in certain habitats than in others. There is, however, uncertainty as to exactly which factors are responsible for this phenomenon. Species composition as well as habitat data were collected from plots situated on the...
  3. Interaction between cultivar and soil fertility on grain yield, yield components and grain nitrogen content of wheat

    Interaction between cultivar and soil fertility on grain yield, yield components and grain nitrogen content of wheat

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of soil nutrient status on the performance of four wheat cultivars was studied in a long-term field experiment at the University of Pretoria. The objective was to quantify the effect of soil nutrient status on yield, yield components...
  4. Influence of residual manure on selected nutrient elements and microbial composition of soil under long-term crop rotation

    Influence of residual manure on selected nutrient elements and microbial composition of soil under long-term crop rotation

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A study was conducted on a long-term field experiment at the University of Pretoria, South Africa, that was established in 1939. The aim was to investigate the effects of residual manure on the characteristics of the total and microbial biomass...
  5. 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...
  6. AIDS communications through social networks: catalyst for behaviour changes in Uganda

    AIDS communications through social networks: catalyst for behaviour changes in Uganda

    Item type: Journal Article • Journal: African Journal of AIDS Research
    Objective: To investigate distinctive communications through social networks which may be associated with population behaviour changes and HIV prevalence declines in Uganda compared to other countries.
  7. Salutogenic Profile of Police Trainees on Entry into the Profession

    Salutogenic Profile of Police Trainees on Entry into the Profession

    Item type: Journal Article • Journal: Journal of Psychology in Africa
    The study aimed to determine the salutogenic (wellbeing) profile of South African police trainees on entry into the profession. Participants were police trainees with an average age of 26 years enrolled for basic training in a police college. Sample sizes...
  8. Longitudinal Predictive Validity of a Learning Potential Test

    Longitudinal Predictive Validity of a Learning Potential Test

    Item type: Journal Article • Journal: Journal of Psychology in Africa
    The aim of this article is to provide empirical psychometric evidence of the (longitudinal) predictive validity of a learning potential measure—the Learning Potential Computerised Adaptive Test (LPCAT)—in comparison with standard static tests with school aggregate results as the criterion measure...
  9. A Modern Assessment Psychometric Approach to Dynamic Assessment

    A Modern Assessment Psychometric Approach to Dynamic Assessment

    Item type: Journal Article • Journal: Journal of Psychology in Africa
    Although dynamic assessment (DA) has been hailed as a positive move towards fair assessment, it has generally not been used in educational or industry settings to the same extent that standard (static) tests have been. The present article attempts to...