Articles by Keyword: Testing

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  1. Yield assessment of advanced wheat breeding lines in the Winter Rainfall Region of South Africa. II. Choosing representative trial sites

    Yield assessment of advanced wheat breeding lines in the Winter Rainfall Region of South Africa. II. Choosing representative trial sites

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    An evaluation of the present system of testing of advanced wheat lines was made in terms of expected genetic gain from selection. Indications are that this system can function quite effectively if properly managed. The feasibility of substituting high potential...
  2. Utility of ear plots versus hill and row plots in wheat breeding programmes

    Utility of ear plots versus hill and row plots in wheat breeding programmes

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Yield testing in early generations of wheat breeding programmes is limited by large numbers of lines and small amounts of seed. This paper compares yield testing using conventional row plots, hill plots and small single-ear plots. The effects of smaller...
  3. THE USE OF TOXICITY TESTING IN EFFLUENT REGULATION AND CONTROL: A NEW DIMENSION TO ASSESSMENT AND MANAGEMENT OF WATER QUALITY IN SOUTH AFRICA

    THE USE OF TOXICITY TESTING IN EFFLUENT REGULATION AND CONTROL: A NEW DIMENSION TO ASSESSMENT AND MANAGEMENT OF WATER QUALITY IN SOUTH AFRICA

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Efficient management tools are continually required to cope with increasing demands placed on the quality and quantity of aquatic resources. Recent developments in environmental monitoring indicate the importance of incorporating biological indicators in assessment programmes. Aquatic toxicology has consequently become...
  4. Responses of productive and unproductive kikuyu pastures to top‐dressed nitrogen and phosphorus fertiliser

    Responses of productive and unproductive kikuyu pastures to top‐dressed nitrogen and phosphorus fertiliser

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    In South Africa there is widespread reliance on kikuyu grass as a source of summer forage for intensive dairy, beef and sheep enterprises. There is, however, a dearth of reliable information on the fertility requirements of kikuyu pastures. Responses of...
  5. Soil fertility management in pasture small-plot trials: potential pitfalls

    Soil fertility management in pasture small-plot trials: potential pitfalls

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Small-plot cutting trials are of particular importance in research relating to intensive pastures. Undetected changes in soil fertility during the course of experimentation may detract from the validity of results in trials of this kind. Information from field trials conducted...
  6. Lay Counsellor-Based Risk Reduction Intervention with HIV Negative Diagnosed Patients at HIV Counselling and Testing Sites in a Rural South African Setting

    Lay Counsellor-Based Risk Reduction Intervention with HIV Negative Diagnosed Patients at HIV Counselling and Testing Sites in a Rural South African Setting

    Item type: Journal Article • Journal: Journal of Psychology in Africa
    The study evaluated the feasibility, fidelity, and effectiveness of a human immunodeficiency virus (HIV) prevention intervention delivered to HIV-uninfected patients by lay counsellors during routine HIV counselling and testing (HCT) service in Mpumalanga, South Africa. Participants were 543 HIV negative...
  7. 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...
  8. 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...
  9. The Influence of Mode of Test Administration on Test Performance

    The Influence of Mode of Test Administration on Test Performance

    Item type: Journal Article • Journal: Journal of Psychology in Africa
    This study examined the influence of mode of test administration (paper based or computer-based) on anxiety levels and test performance. Participants were 44 learners (males = 22, females = 22) from three schools in Johannesburg, South Africa who completed both...
  10. Prevalence of HIV infection among premarital couples in southeast Nigeria

    Prevalence of HIV infection among premarital couples in southeast Nigeria

    Item type: Journal Article • Journal: African Journal of AIDS Research
    The Catholic Church in Nigeria offers premarital HIV screening to couples, yet instances of voluntary screening are rare in southeast Nigeria. This study examines the contribution of such tests to HIV detection, and evaluates the prevalence of HIV infection in...