Articles by Author: Christian P Du Plooy

Search results for Christian P Du Plooy

We found 41 results for you
  1. Productivity of non-heading Chinese cabbage (<em>Brassica rapa</em> subsp. <em>chinensis</em>) under different agronomic management factors

    Productivity of non-heading Chinese cabbage (<em>Brassica rapa</em> subsp. <em>chinensis</em>) under different agronomic management factors

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Productivity of non-heading Chinese cabbage (Brassica rapa L. subsp. chinensis) was evaluated at Roodeplaat over two winter seasons (2012 and 2013). Agronomic factors considered were plant density, nitrogen level, irrigation frequency and planting date. Irrigating thrice or once a week...
  2. Storage root formation at individual nodes of the sweet potato (<em>Ipomoea batatas</em> (L.) Lam)

    Storage root formation at individual nodes of the sweet potato (<em>Ipomoea batatas</em> (L.) Lam)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Little or no information is available on the contribution of individual subterranean nodes to the storage root formation in sweet potatoes. Therefore, two field trials were conducted where apical vine cuttings of various cultivars were planted vertically or horizontally, with...
  3. Effect of BP1, BP3 and Quince A rootstocks, at three planting densities, on precocity and fruit quality of ‘Forelle’ pear (<em>Pyrus communis</em> L.)

    Effect of BP1, BP3 and Quince A rootstocks, at three planting densities, on precocity and fruit quality of ‘Forelle’ pear (<em>Pyrus communis</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    ‘Forelle’ pear trees (Pyrus communis L.) were established at the Bien Donné experimental farm in the Western Cape Province of South Africa on BP1, BP3 and Quince A rootstocks at three planting densities, i.e., 889, 1667 and 2857 trees. ha...
  4. Effect of pruning on yield and quality of hydroponically grown cherry tomato (<em>Lycopersicon esculentum</em>)

    Effect of pruning on yield and quality of hydroponically grown cherry tomato (<em>Lycopersicon esculentum</em>)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The commercial importance of cherry tomatoes is continuously increasing in the South African retail market, with fruit size playing an important role. The effect of pruning on yield and quality of two cherry tomato cultivars (Naomi and Josefina) with an...
  5. Effect of plant spacing on growth and yield of lettuce (<em>Lactuca sativa</em> L.) in a soilless production system

    Effect of plant spacing on growth and yield of lettuce (<em>Lactuca sativa</em> L.) in a soilless production system

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Lettuce production in re-circulating hydroponic systems is done on a limited scale in South Africa with conflicting information on the recommended spacing for optimal yield and quality in such systems. The development and yield of four lettuce (Lactuca sativa L.)...
  6. Comparative performance of tomato cultivars cultivated in two hydroponic production systems

    Comparative performance of tomato cultivars cultivated in two hydroponic production systems

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Cultivar selection for different hydroponic production systems is an important management decision, potentially impacting the tomato grower’s profitability. Knowledge on the performance of tomato cultivars, in specific hydroponic systems (open-bag and closed system) under South African conditions, is still very...
  7. What is <em>Ubuntu</em>,? Different Interpretations among South Africans of African Descent

    What is <em>Ubuntu</em>,? Different Interpretations among South Africans of African Descent

    Item type: Journal Article • Journal: South African Journal of Philosophy
    In this article, I describe and systematize the different answers to the question ‘What is ubuntu,?’ that I have been able to identify among South Africans of African descent (SAADs). I show that it is possible to distinguish between two...
  8. Restorative Justice and the South African Truth and Reconciliation Process

    Restorative Justice and the South African Truth and Reconciliation Process

    Item type: Journal Article • Journal: South African Journal of Philosophy
    It has frequently been argued that the post-apartheid Truth and Reconciliation Commission (TRC) was committed to restorative justice (RJ), and that RJ has deep historical roots in African indigenous cultures by virtue of its congruence both with ubuntu and with...
  9. A Cross-Cultural Comparison of Motivational Factors in Kenyan and Danish Middle and Long Distance Elite Runners

    A Cross-Cultural Comparison of Motivational Factors in Kenyan and Danish Middle and Long Distance Elite Runners

    Item type: Journal Article • Journal: Journal of Psychology in Africa
    This study examined similarities and differences in motivational factors and reasons for running between Kenyan and Danish elite runners. Participants were elite middle and long distance runners (distances from 800m to marathon) from Kenya (n = 139, males = 114,...
  10. Flood effects on trophic linkages of selected fish species in the littoral zone of the St Lucia estuarine system, South Africa

    Flood effects on trophic linkages of selected fish species in the littoral zone of the St Lucia estuarine system, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The St Lucia Estuary, a UNESCO World Heritage Site, has experienced prolonged mouth closure since 2002. Until recently it was hypersaline, but heavy rainfall between October 2010 and January 2011 led to a large overall decrease in salinity. A stable...