Articles by Keyword: Trout Farm Effluents

Search results for Trout Farm Effluents

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  1. THE EFFECTS OF TROUT-FARM EFFLUENTS ON BENTHIC INVERTEBRATE COMMUNITY STRUCTURE IN RIVERS IN THE SOUTH-WESTERN CAPE, SOUTH AFRICA

    THE EFFECTS OF TROUT-FARM EFFLUENTS ON BENTHIC INVERTEBRATE COMMUNITY STRUCTURE IN RIVERS IN THE SOUTH-WESTERN CAPE, SOUTH AFRICA

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The south-western Cape is currently responsible for 45% of the total annual trout production in South Africa and further expansion of this industry in the region is likely. A preliminary survey of seven trout farms situated on the upper reaches...
  2. An evaluation of the economic viability of commercial pastoralism in the <em>smaldeel</em> area of the Eastern Cape

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Carrying capacity models and financial data from study group farmers were used to derive attainable net revenue per ha on veld in good, moderate and poor condition. From these data, minimum farm sizes required for a reasonable standard of living...
  3. Behaviour of sesquioxic clay soils subjected to alkaline and saline effluents

    Behaviour of sesquioxic clay soils subjected to alkaline and saline effluents

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effects of disposal of alkaline and saline effluents on sesquioxic red clay soils have been monitored for many years on a site in the eastern Transvaal. Recently a high chloride content effluent with a sodium adsorption ratio (SAR) of...
  4. Sodicity phenomena in red sesquioxic clay subsoils

    Sodicity phenomena in red sesquioxic clay subsoils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Monitoring for many years of the soils of an effluent disposal site in the eastern Transvaal has shown that the disposal of alkaline and saline effluents on red sesquioxic clays has not appreciably affected soil permeability but has brought about...
  5. Evaluering van die effek van industriële uitvloeisels op grondbiodegradasie en ontkieming met behulp van mikrobiologiese aktiwiteitsbepalings en ontkiemingstudies

    Evaluering van die effek van industriële uitvloeisels op grondbiodegradasie en ontkieming met behulp van mikrobiologiese aktiwiteitsbepalings en ontkiemingstudies

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die bydrae van grondmikro-organismes tot biologiese aktiwiteite in die grand is baie belangrik, veral met betrekking tot hul metaboliese aktiwiteite, asook hul rol in energievloei en voedingsiklusse van, bv. C, N, P, S, Fe, Mn, en Si. 'n Versteuring van...
  6. Soil compaction by tractor tillage in horticultural fields at Molelwane research farm, Mafikeng, North West Province

    Soil compaction by tractor tillage in horticultural fields at Molelwane research farm, Mafikeng, North West Province

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The study was prompted by concerns that soil compaction in horticultural fields at the University research farm was limiting the performance of fruit trees and vegetable crops after fifteen years of conventional tillage with tractors. Soil penetrometer resistance and bulk...
  7. FAECAL BACTERIAL CONTAMINATION OF TROUT HATCHERY WATER EFFLUENT

    FAECAL BACTERIAL CONTAMINATION OF TROUT HATCHERY WATER EFFLUENT

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    This study was undertaken to determine the occurrence of faecal bacteria in two trout hatcheries in the Transvaal Province, South Africa. The results indicate that variations in numbers of enteric bacteria are partly caused by man-made changes to the influent...
  8. FRESHWATER FISH CONSERVATION IN SOUTH AFRICA: A RISING TIDE

    FRESHWATER FISH CONSERVATION IN SOUTH AFRICA: A RISING TIDE

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Attitudes towards the conservation of South African indigenous freshwater fishes have changed radically. Initially alien sport angling species were the focus of fisheries interest and local fishes were considered worthless. Gradually, in response to the work of collectors, taxonomists and...
  9. Relationships between growth, mineral nutrition and site factors for <em>Eucalyptus camaldulensis</em> (Dehnh) planted in some communal areas of Zimbabwe

    Relationships between growth, mineral nutrition and site factors for <em>Eucalyptus camaldulensis</em> (Dehnh) planted in some communal areas of Zimbabwe

    Item type: Journal Article • Journal: The Southern African Forestry Journal
    The Forestry Commission of Zimbabwe has been implementing a Rural Afforestation Project since 1983. The main species promoted were the eucalypts, especially Eucalyptus camaldulensis (Dehnh). A survey of twenty-seven woodlots of E. camaldulensis with ages between I and 10 years...
  10. The application of the Zero Emissions Research and Initiatives (ZERI) concept in an integrated industry-polyculture-farm system in Namibia: The case of Tunweni Sorghum Brewery

    The application of the Zero Emissions Research and Initiatives (ZERI) concept in an integrated industry-polyculture-farm system in Namibia: The case of Tunweni Sorghum Brewery

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    One major area dealt with by the concept of Zero Emissions Research and Initiatives (ZERI) is the utilisation of huge volumes of nutrient-rich waters from household toilets, kitchen sinks and municipal and organo-industries for integrated purposes. The arrangements at the...