Articles by Author: Willem S Jansen Van Rensburg

Search results for Willem S Jansen Van Rensburg

We found 228 results for you
  1. Genetic diversity of <em>Amaranthus</em> species in South Africa

    Genetic diversity of <em>Amaranthus</em> species in South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Amaranthus species plays an important role in sustaining food security and alleviation of malnutrition in South Africa. A number of Amaranthus genotypes have been collected and conserved in the gene bank of the ARC–Roodeplaat Vegetable and Ornamental Plant Institute, South...
  2. Genetic variability in cowpea (<em>Vigna unguiculata</em> (L.) Walp.) genotypes

    Genetic variability in cowpea (<em>Vigna unguiculata</em> (L.) Walp.) genotypes

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Information on genetic variability among the existing cowpea genotypes will increase the efficiency of the cowpea improvement. Field experiments were conducted at the Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute in South Africa, in 2011 and 2012, to estimate...
  3. Preliminary evaluation of seed and germination traits in cowpea (<em>Vigna unguiculata</em>) genotypes

    Preliminary evaluation of seed and germination traits in cowpea (<em>Vigna unguiculata</em>) genotypes

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Cowpea is a valuable crop for subsistence farmers in South Africa. Seed quantitative traits and germination parameters are important for good establishment of the crop, therefore the variation for these traits were determined for 44 cowpea genotypes. A field experiment...
  4. Effect of herbicides on survival of rhizobia and nodulation of peas, groundnuts and lucerne

    Effect of herbicides on survival of rhizobia and nodulation of peas, groundnuts and lucerne

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Thirteen herbicides were tested for toxicity against strains of Rhizobium used in South African legume inoculants for lucerne, clover, soybeans, groundnuts and lupins, respectively. Each of alachlor, bromoxynil, proprop, metolachlor, naptalam + dinoseb, and trifluralin inhibited at least two of...
  5. AN IDENTIFICATION KEY TO THE WATER MITE FAMILIES OF THE ETHIOPIAN REGION

    AN IDENTIFICATION KEY TO THE WATER MITE FAMILIES OF THE ETHIOPIAN REGION

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The general external morphology of water mites is described. The superfamilies with their characters are listed. An illustrated key to the Ethiopian families is included.
  6. Development of a sequence characterized amplified region (SCAR) marker for the identification of the potato cultivars Astrid and Mnandi

    Development of a sequence characterized amplified region (SCAR) marker for the identification of the potato cultivars Astrid and Mnandi

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Astrid and Mnandi are two closely related potato cultivars of commercial importance in Southern Africa. Random amplified polymorphic DNA (RAPD) markers were screened and a sequence characterized amplified region (SCAR) marker was developed to distinguish between these two cultivars since...
  7. Microbial community function and structure on coal mine discard under rehabilitation

    Microbial community function and structure on coal mine discard under rehabilitation

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The rehabilitation of coal mine discard is problematic, especially since the lack of measures to evaluate the success of rehabilitation in terms of the self-sustainability of soil ecosystems established on these sites. In this study, the potential for using microbial...
  8. Relationships between soil buffer capacity and selected soil properties in a resource-poor farming area in the Mpumalanga Province of South Africa

    Relationships between soil buffer capacity and selected soil properties in a resource-poor farming area in the Mpumalanga Province of South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    In this study, the soil buffer capacity (soil BC) was measured for 80 topsoil samples of the most dominant soil forms in a small-scale farming area. Soils used in the study ranged from weakly to strongly buffered, with soil BC...
  9. Assessing the potential soil acidification risk under dryland agriculture in the Mlondozi district in the Mpumalanga Province of South Africa

    Assessing the potential soil acidification risk under dryland agriculture in the Mlondozi district in the Mpumalanga Province of South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The farming community in the Mlondozi district in the Mpumalanga Province of South Africa has been part of a government liming intervention with the objective to ameliorate the serious soil acidity problem in the district. The current study was undertaken...
  10. Gill damage, metallothionein gene expression and metal accumulation in <em>Tilapia sparrmanii</em> from selected field sites at Rustenburg and Potchefstroom, South Africa

    Gill damage, metallothionein gene expression and metal accumulation in <em>Tilapia sparrmanii</em> from selected field sites at Rustenburg and Potchefstroom, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Fish were collected from field sites in the mining and agricultural areas of Potchefstroom and Rustenburg, North-West Province, South Africa. Water and sediment samples from each site, together with fish muscle and gills, were analysed by Inductively Coupled Plasma Mass...