Articles by Keyword: Environmental Factors

Search results for Environmental Factors

We found 260 results for you
  1. Some factors effecting the dry matter production of lucerne cultivars

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Dry matter yields of lucerne cultivars were affected by different factors. A simple equation is given for predicting total dry matter yield of irrigated lucerne based on mean maximum temperatures in January.
  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. <em>Alexandrium catenella</em> and <em>Alexandrium tamarense</em> in the North Lake of Tunis: bloom characteristics and the occurrence of paralytic shellfish toxin

    <em>Alexandrium catenella</em> and <em>Alexandrium tamarense</em> in the North Lake of Tunis: bloom characteristics and the occurrence of paralytic shellfish toxin

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The dinoflagellate Alexandrium is thought to be the main species responsible for paralytic shellfish poisoning (PSP) throughout the world. The genus Alexandrium is present in unusually high diversity in the North Lake of Tunis, a productive Mediterranean fishing and shellfish...
  4. Assessment of HIV-positive in-patients using the International Classification of Functioning, Disability and Health (ICF) at Chris Hani Baragwanath Hospital, Johannesburg

    Assessment of HIV-positive in-patients using the International Classification of Functioning, Disability and Health (ICF) at Chris Hani Baragwanath Hospital, Johannesburg

    Item type: Journal Article • Journal: African Journal of AIDS Research
    The International Classification of Functioning, Disability and Health (ICF) short-version checklist was used to assess the impairments, activity limitations and participation restrictions experienced by a sample of HIV-positive in-patients admitted to Chris Hani Baragwanath Hospital in Johannesburg, South Africa. Laboratory...
  5. Aquatic invertebrate fauna of wells in a tropical mountain climate, western Cameroon

    Aquatic invertebrate fauna of wells in a tropical mountain climate, western Cameroon

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The present study, conducted between May 2012 and September 2013, aimed to determine the distribution of groundwater invertebrates in the Bamoun tableland, Cameroon. A total of 216 samples taken from 30 wells in four localities – Foumban, Foumbot, Kouoptamo and...
  6. Environmental health factors associated with diarrhoeal diseases among under-five children in the Sebeta town of Ethiopia

    Environmental health factors associated with diarrhoeal diseases among under-five children in the Sebeta town of Ethiopia

    Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases
    The aim of this study was to assess and explore household environmental health factors associated with the occurrence of diarrhoea experienced by children under five years of age in Sebeta town of Ethiopia. A cross-sectional study, using stratified random sampling...
  7. Conservation Developments in South African Forestry

    Item type: Journal Article • Journal: South African Forestry Journal
    The historical development of environmental conservational activities within the South African Forestry Industry is followed, and the changing emphasis from the conservation of the remaining indigenous forests (pre-1900) to water conservation, to natural assets and unplanted areas is highlighted. The...
  8. A survey of grazed and ungrazed grassland in the south‐eastern Transvaal highveld 2. Potential floristic composition and patterns of degradation

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The floristic composition of selected veld communities which, by virtue of their location were ungrazed but regularly burned, and which were judged to reflect potential floristic composition, was measured at 112 sites in the southeastern Transvaal highveld. Relevant environmental parameters...
  9. The persistence in soil and phytotoxicity on dry beans of alachlor and metolachlor as affected by climatic factors

    The persistence in soil and phytotoxicity on dry beans of alachlor and metolachlor as affected by climatic factors

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The persistence of alachlor (2-chloro-2′, 6′-diethyl-N-methoxymethylacetanilide) and metolachlor [2-chloro-6′-ethyl-N-(2-methoxy-1-methylethyl)acet-O-toluidide] in soil was determined over an 80-day period at temperatures ranging from 5 to 50°C. Soils were maintained at either 50 or 100% of field capacity. The herbicides were less persistent...
  10. Invloed van sekere grondeienskappe op aktiwiteit van atrasien

    Invloed van sekere grondeienskappe op aktiwiteit van atrasien

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die aktiwiteit van atrasien is in biotoetse onder gekontroleerde toestande ondersoek in 43 gronde vanaf 29 lokaliteite geleë in die somerreënvalstreek van Suid-Afrika. Sojabone en hawer is in afsonderlike proewe as toetsgewas gebruik. Geselekteerde grondeienskappe is met atrasienaktiwiteit gekorreleer. In...