Articles by Keyword: Aquarium Release

Search results for Aquarium Release

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  1. First record of the Southeast Asian walking catfish, <em>Clarias batrachus</em> (Pisces: Clariidae), from the island of Mauritius, south-western Indian Ocean

    First record of the Southeast Asian walking catfish, <em>Clarias batrachus</em> (Pisces: Clariidae), from the island of Mauritius, south-western Indian Ocean

    Item type: Journal Article • Journal: African Zoology
    The presence of Southeast Asian walking catfish, Clarias batrachus, in Mauritian freshwater systems has been confirmed. Three female Clarias batrachus were caught in Rivière Sèche, close to the town of Phoenix, Mauritius (20°17′ S, 57°33′ E). This constitutes the first...
  2. Factors affecting the activity of atrazine in plants and soil

    Factors affecting the activity of atrazine in plants and soil

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Available research findings concerning (he activity of atrazine in the plant and soil are presented in a brief review. The role of the environment is emphasized. This review is supplemented by recent research results of the University of Pretoria concerning...
  3. Kaliumvaslegging in 'n Arcadia-grond: I. Vaslegging onder natuurlike toestande

    Kaliumvaslegging in 'n Arcadia-grond: I. Vaslegging onder natuurlike toestande

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Ten einde die mate van kaliumvaslegging op 'n grand van die Arcadia-serie onder natuurlike toestande na te gaan, is grondmonsters van 'n reeks proefpersele geneem. Die persele het verskillende hoeveelhede kaliumbemesting oor 'n periode van 12 jaar ontvang. Die monsters...
  4. Kaliumvaslegging in 'n Arcadia-grond II. Vaslegging in die kleifraksie

    Kaliumvaslegging in 'n Arcadia-grond II. Vaslegging in die kleifraksie

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Ondersoek is ingestel na die invloed van relatief lae toedienings van kalium, asook drogingstemperatuur, op die vermoë van die kleifraksie van 'n Arcadia-grond, versadig met kalsium of magnesium, om kalium vas te lê. Die verskil in reaksie tussen die behandelings...
  5. Selenium in some grass pastures of Natal and fertilizer-induced Se uptake by ryegrass (<em>Lolium multiflorum</em>)

    Selenium in some grass pastures of Natal and fertilizer-induced Se uptake by ryegrass (<em>Lolium multiflorum</em>)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Samples of irrigated ryegrass pasture and natural veld from various parts of Natal were found, with one exception, to lack the amount of Se normally considered sufficient (0.1 mg kg−1) for grazing animals. No soil properties could be identified by...
  6. Evaluation of an undisturbed-soil incubation method as an index of soil nitrogen availability in a limed and non-limed soil

    Evaluation of an undisturbed-soil incubation method as an index of soil nitrogen availability in a limed and non-limed soil

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Nitrogen mineralization potentials were determined using an undisturbed-soil incubation procedure. The purpose of this study was to evaluate the above-mentioned method as an index of soil nitrogen availability. Undisturbed soil samples (0–150 and 150–300 mm) of a limed (pH 7.3)...
  7. Release of three grain sorghum pure line varieties in Botswana

    Release of three grain sorghum pure line varieties in Botswana

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Three sorghum varieties, Macia, SDS 2583 and Bot 79, were cooperatively developed by the Botswana National Agricultural Research System (NARS) and the Southern African Development Community/International Crops Research Institute for the Semi-Arid Tropics (SADC/ICRISAT). These were jointly tested for four...
  8. Recurrent selection for resistance in maize to the African stalk borer, <em>Busseola fusca (Fuller)</em>

    Recurrent selection for resistance in maize to the African stalk borer, <em>Busseola fusca (Fuller)</em>

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Stem borer resistant inbred lines Mp704 and Mp706 of Mississippi origin were used as donor parents in a recurrent selection programme, to develop locally adapted germplasm with improved resistance to the stalk borer Busseola fusca. The segregating progenies of crosses...
  9. New streak resistant maize lines derived from the Vaalharts composite

    New streak resistant maize lines derived from the Vaalharts composite

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Experimental white and yellow maize inbred lines of US Corn Belt derivation were improved for streak resistance using the improved Vaalharts Composite in yellow kernel colour (VHC2) and its counterpart in white (VHCW) as donor parents. Using natural infection and...
  10. Long-term kinetics of phosphate desorption from soil and its relationship with plant growth

    Long-term kinetics of phosphate desorption from soil and its relationship with plant growth

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Knowledge on the availability of residual P in soils is of great importance for fertilization management. The use of dialysis membrane tubes filled with hydrous ferric oxide solution has recently been reported as an effective way to characterize P desorption...