Articles by Keyword: Growth Parameters

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  1. THE INTERRELATIONSHIPS BETWEEN THE BIOLOGICAL AND PHYSICO-CHEMICAL PARAMETERS IN THE WATER PHASE OF SESHEGO DAM, NORTHERN TRANSVAAL

    THE INTERRELATIONSHIPS BETWEEN THE BIOLOGICAL AND PHYSICO-CHEMICAL PARAMETERS IN THE WATER PHASE OF SESHEGO DAM, NORTHERN TRANSVAAL

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Seshego Dam, Lebowa, was investigated over a period of 15 months (1974 – 1975). The interrelationships between biological parameters such as Biological Growth Potential (BGP), anaerobic fecal and coliform bacteria, Cladocera and Copepoda were established by means of factor and...
  2. The use of bitter kola <em>Garcinia kola</em> dry seed powder as a natural growth-promoting agent for African sharptooth catfish <em>Clarias gariepinus</em> fingerlings

    The use of bitter kola <em>Garcinia kola</em> dry seed powder as a natural growth-promoting agent for African sharptooth catfish <em>Clarias gariepinus</em> fingerlings

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The effect of dietary Garcinia kola seed meal on growth and body composition was investigated in catfish Clarias gariepinus. Fingerlings of about 50 g were fed diets supplemented with four concentrations (50, 100, 150 and 200 g kg−1) of G...
  3. Growth rate of speckled snapper <em>Lutjanus rivulatus</em> (Teleostei: Lutjanidae) based on tag-recapture data from the iSimangaliso Wetland Park, South Africa

    Growth rate of speckled snapper <em>Lutjanus rivulatus</em> (Teleostei: Lutjanidae) based on tag-recapture data from the iSimangaliso Wetland Park, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    The growth rate of speckled snapper Lutjanus rivulatus was investigated using data from a long-term tag-recapture study conducted in the St Lucia Marine Reserve within the iSimangaliso Wetland Park, a World Heritage Site in northern KwaZulu-Natal, South Africa. A total...
  4. Evaluation of the effects of phosphorus and nitrogen source on aerial and subsoil parameters of maize (<em>Zea mays</em> L.) during early growth and development

    Evaluation of the effects of phosphorus and nitrogen source on aerial and subsoil parameters of maize (<em>Zea mays</em> L.) during early growth and development

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Understanding the nutrient requirements of maize is especially important during early vegetative growth and development, particularly when produced on highly weathered soils with low organic matter contents. Therefore, the growth response of maize to different nitrogen (N) sources viz. limestone...
  5. Lifetable demography and population growth of the rotifer <em>Brachionus angularis</em> in Kenya: influence of temperature and food density

    Lifetable demography and population growth of the rotifer <em>Brachionus angularis</em> in Kenya: influence of temperature and food density

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Lifetable demography and reproductive traits of a Kenyan strain of the rotifer Brachionus angularis were investigated using individual and small batch culture approaches. The rotifer was identified morphologically before conducting studies at 20, 25 and 30 °C, using Chlorella vulgaris...
  6. Potential of producing green mealies in summer and winter at two sites in KwaZulu-Natal, South Africa, considering rainfall, soil moisture and weeding

    Potential of producing green mealies in summer and winter at two sites in KwaZulu-Natal, South Africa, considering rainfall, soil moisture and weeding

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Producers are exploring possibilities of growing major crops outside the normal growing seasons due to environmental challenges associated with climate change. This study evaluated growth and yield of maize (Zea mays ‘SC701′) in relation to planting season and weeding. Field...
  7. Index selection for growth and construction wood properties in <em>Pinus elliottii</em> open-pollinated families in southern China

    Index selection for growth and construction wood properties in <em>Pinus elliottii</em> open-pollinated families in southern China

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    The initial introduction of Pinus elliottii (PEE) to China occurred in the 1930s, and the planting of this conifer species has now attained close to 3 million ha in the subtropical zone of southern China. A large-scale genetic improvement program...
  8. The Application of Inorganic Fertilisers to Conditioned <em>Pinus radiata</em> Prior to Lifting as a Means of Improving Root Growth Capacity

    Item type: Journal Article • Journal: South African Forestry Journal
    A modified root growth capacity technique was used to evaluate the effect of the application of different types and quantities of fertilisers on the root growth capacity (RGC) of conditioned Pinus radiata seedlings. The experiment indicates that 0,05 g N...
  9. Role of Eucalypt Plantations in Timber Supply and Forest Conservation in Sub-Saharan Africa

    Item type: Journal Article • Journal: South African Forestry Journal
    The role of eucalypt plantations in timber supply and forest conservation in Sub-Saharan Africa was investigated. The annual destruction of 11,5 million ha of tropical forest is highlighted, the various causes indicated and the controversy whether fast-growing plantations and woodlots...
  10. Effect of Initial Spacing and Thinning on Some Wood Properties of <em>Eucalyptus grandis</em>

    Item type: Journal Article • Journal: South African Forestry Journal
    A study was made of the effect of thinning intensity on wood density and some wood anatomical properties and their within-tree variation patterns, as well as the extent to which the development of growth-stress splits in logs and sawn boards...