Articles by Author: Jacobus Christoffel Engelbrecht

Search results for Jacobus Christoffel Engelbrecht

We found 71 results for you
  1. Health risk assessment of exposure to ambient concentrations of benzene, toluene and xylene in Pretoria West, South Africa

    Health risk assessment of exposure to ambient concentrations of benzene, toluene and xylene in Pretoria West, South Africa

    Benzene, toluene and xylene (BTX) are part of the volatile organic group of pollutants and are seen as international environmental priority air pollutants that can constitute a threat to public health. This study assessed the non-carcinogenic and carcinogenic risks of...
  2. The South African Harvesting Code of Practice

    Item type: Journal Article • Journal: South African Forestry Journal
    The South African Harvesting Code of Practice is a set of guidelines developed by harvesting specialists to assist the Forest Industry to select correct harvesting and road construction practices that are consistent with appropriate environmental management principles. The focus is...
  3. Evaluering van braakstelsels vir droëlandkoringverbouing in die Oranje-Vrystaat

    Evaluering van braakstelsels vir droëlandkoringverbouing in die Oranje-Vrystaat

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Drie produksiestelsels vir droëlandkoring is te Glen en Bethlehem geëvalueer. Die kortbraak was vyf tot ses maande, intermediêre-braak was 12 tot 13 maande en langbraak was 17 maande. Glen verteenwoordig 'n semi-ariede somerreëngebied waar die proefgrond 'n plantbeskikbare-waterstoorkapasiteit van 148...
  4. Response of <em>Lachenalia</em> growing in soil to nitrogen fertilization during the nursery phase

    Response of <em>Lachenalia</em> growing in soil to nitrogen fertilization during the nursery phase

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    During the nursery phase, Lachenalia flower bulb producers plant bulblets propagated from leaf cuttings, for enlargement. They strive for a high yield of good quality bulbs that are of a marketable size within a year. In this regard nitrogen is...
  5. Response of <em>Lachenalia</em> growing in soil to nitrogen fertilisation during the pot plant phase

    Response of <em>Lachenalia</em> growing in soil to nitrogen fertilisation during the pot plant phase

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Lachenalia bulbs used in the pot plant industry are produced in the nursery phase from bulblets propagated from leaf cuttings. Fertilisation during this phase of enlargement can ultimately influence the growth and flowering of pot plants through the nutritional status...
  6. Response of <em>Lachenalia</em> growing in soil to interactions between nitrogen and phosphorus fertilisation in the nursery phase

    Response of <em>Lachenalia</em> growing in soil to interactions between nitrogen and phosphorus fertilisation in the nursery phase

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The interactions between nutrients required by plants play an important role in sustainable crop production. Both nitrogen and phosphorus are involved in a number of important functions in the plant such as carbohydrate and protein formation. The need to investigate...
  7. Effect of nitrogen levels and sources on production of Swiss Chard (<em>Beta vulgaris</em> var. <em>Cicla</em>)

    Effect of nitrogen levels and sources on production of Swiss Chard (<em>Beta vulgaris</em> var. <em>Cicla</em>)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    To optimise the production of Swiss chard, high levels of nitrogen fertiliser are often applied. This may have adverse effects on both the economy of fertilisation and the nutritional value of the human diet. Very little is known about both...
  8. Nursing students' use of language in communicating with isiZulu speaking clients in clinical settings in KwaZulu-Natal

    Nursing students' use of language in communicating with isiZulu speaking clients in clinical settings in KwaZulu-Natal

    Item type: Journal Article • Journal: South African Journal of African Languages
    Language provides an important means by which humans communicate with one another, and communication plays a pivotal role in the health professions in developing trust and co-operation between the carer and the one being cared for. Little has been written...