Articles by Keyword: Alkaline And Saline Effluents

Search results for Alkaline And Saline Effluents

We found 13 results for you
  1. 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...
  2. 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...
  3. Effect of application methods on ammonia volatilization from soils in a controlled environment

    Effect of application methods on ammonia volatilization from soils in a controlled environment

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The objective of this investigation was to compare different application methods whereby ammonia losses from nitrogen fertilizers can be limited when applied to alkaline soils. Three application methods were simulated, namely broadcasting, ploughing under and band placement. Five nitrogen fertilizers,...
  4. 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...
  5. Wheat <em>(Triticum aestivum</em> L.) growth and yield response to saline irrigation water under controlled conditions

    Wheat <em>(Triticum aestivum</em> L.) growth and yield response to saline irrigation water under controlled conditions

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Serious agronomic problems occur where saline water is used for irrigation. The effect of irrigation water salinity on wheat was investigated using electrical conductivity (ECi, mS m−1) as a salinity indicator. A pot experiment was conducted at the University of...
  6. THE USE OF BENZOCAINE HYDROCHLORIDE AS FISH TRANQUILLIZER AND ANAESTHETIC IN SALINE WATERS

    THE USE OF BENZOCAINE HYDROCHLORIDE AS FISH TRANQUILLIZER AND ANAESTHETIC IN SALINE WATERS

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The anaesthetic effects of various concentrations of benzocaine hydrochloride were tested on Liza macrolepis and Sarotherodor mossambicus in sea water and diluted sea water, respectively. Induction time for anaesthesia was negatively correlated with increasing anaesthetic concentrations in L. macrolepis.
  7. OBSERVATIONS ON THE COEXISTENCE OF FRESH AND SALTWATER INVERTEBRATES IN AN INLAND SALTWORKS

    OBSERVATIONS ON THE COEXISTENCE OF FRESH AND SALTWATER INVERTEBRATES IN AN INLAND SALTWORKS

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The fauna of three excavated trenches in the floor of the dry salt-pan in the Brandfort district of the Orange Free State was investigated. Two were found to contain typical saline water invertebrate fauna such as Artemia sp. and the...
  8. 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...
  9. Impact of marine influence and cultivation on the diatom flora of Thiaroye Pond, Dakar, Senegal

    Impact of marine influence and cultivation on the diatom flora of Thiaroye Pond, Dakar, Senegal

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    During a limnological and palaeolimnological study of the western part of the Great Coast of Senegal, an analysis of diatoms was carried out in Thiaroye Pond in the suburbs of Dakar. Current diatom flora in the water and on floating...
  10. The community composition and biomass of pelagic ciliated protozoa in East African lakes

    The community composition and biomass of pelagic ciliated protozoa in East African lakes

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The community composition and biomass of planktonic ciliates were studied in 17 tropical East African lakes varying from freshwater to saline, and from oligotrophic to eutrophic. The conductivity of the lakes varied from 207μS cm−1 to 70 000μS cm−1. Chlorophyll...