Articles by Keyword: Carbon Dioxide Co Lt Sub Gt 2 Lt Sub Gt Emissions Tax

Search results for Carbon Dioxide Co Lt Sub Gt 2 Lt Sub Gt Emissions Tax

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  1. The effect of passenger vehicle CO<sub>2</sub> emissions tax on consumer behaviour relating to new car purchase decisions

    The effect of passenger vehicle CO<sub>2</sub> emissions tax on consumer behaviour relating to new car purchase decisions

    Item type: Journal Article • Journal: South African Journal of Accounting Research
    Carbon dioxide (CO2) emissions and the resultant negative effects thereof on the environment due to climate change remain a global challenge. In South Africa, passenger vehicles contribute significantly to the amount of CO2 that is emitted into the atmosphere. In...
  2. The effect of leaf water potential on the carbon-dioxide uptake rate during different growth stages of wheat (<em>Triticum aestivum</em> L.)

    The effect of leaf water potential on the carbon-dioxide uptake rate during different growth stages of wheat (<em>Triticum aestivum</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of water stress on the CO2 uptake rate was measured at three different growth stages of wheat grown in Mitscherlich pots in a glasshouse experiment. Stress was induced by withholding water until the leaf water potential reached −2...
  3. Physiological traits associated with drought tolerance in bread wheat (<em>Triticum aestivum</em> L.) under tropical conditions

    Physiological traits associated with drought tolerance in bread wheat (<em>Triticum aestivum</em> L.) under tropical conditions

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Although it is generally accepted that drought tolerance is a critical agronomic trait, efficient and predictable improvement in drought tolerance in bread wheat (Triticum aestivum L.), in varying drought stress conditions, has not been fully achieved. This study aimed at...
  4. Detecting the onset of rangeland degradation using soil respiration and boundary lines: preliminary findings from the Nama Karoo

    Detecting the onset of rangeland degradation using soil respiration and boundary lines: preliminary findings from the Nama Karoo

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Mean annual soil respiration correlates with net primary productivity and therefore provides an indication of ecosystem functioning. Soil respiration, however, varies considerably in space and time owing to the influence of factors such as soil nutrient content, temperature and water...
  5. Effects of Refrigerant Charge in the Output of a CO<sub>2</sub> Heat Pump

    Effects of Refrigerant Charge in the Output of a CO<sub>2</sub> Heat Pump

    Many of the refrigerants currently being used in heating, ventilation, air conditioning and refrigeration systems have high global warming potential. One potential, environmentally friendly replacement refrigerant is carbon dioxide (CO2). In this study, a CO2 trans-critical water to water test...
  6. Soil carbon dioxide effluxes from different vegetation environments in semi-arid Eastern Cape, South Africa

    Soil carbon dioxide effluxes from different vegetation environments in semi-arid Eastern Cape, South Africa

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Though important, CO2 effluxes from non-agricultural ecosystems are poorly characterised. Given that thicket vegetation is prevalent in Eastern Cape, South Africa, we monitored soil CO2 effluxes from an intact thicket, degraded thicket (DT) and grassland (G) over 10 months, as...
  7. Nutrient limitation in two marine diatoms inhibits release of bromoform

    Nutrient limitation in two marine diatoms inhibits release of bromoform

    Item type: Journal Article • Journal: African Journal of Marine Science
    Bromoform released from phytoplankton and kelp in the ocean is the largest known carrier of bromine to the atmosphere. The photoproducts of atmospheric bromoform catalyse ozone depletion. Laboratory investigations were conducted into the link between nutrient limitation and bromoform production...
  8. Influence of Soil Organic Matter Content on the Responsiveness of <em>Eucalyptus grandis</em> to Nitrogen Fertiliser

    Item type: Journal Article • Journal: South African Forestry Journal
    It is widely recognised that the inherent nitrogen (N) mineralisation capacity of a soil is directly related to the organic matter content. Consequently, in estimating the N requirements of Eucalyptus grandis at planting this mineralisation potential must be taken into...
  9. Partitioning, storage and remobilization of <sup>14</sup>C assimilated by <em>Themeda triandra</em> Forssk<sup>1</sup>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The second youngest fully‐expanded leaf on the main tiller of vegetative Themeda triandra plants was exposed to 14CO2. Thereafter, quantitative analysis of partitioning, storage and remobilization after defoliation of 14C‐labclled assimilate was conducted in serially‐harvested plants over a 27‐day period...
  10. The effect of reduced tillage on soil organic carbon

    The effect of reduced tillage on soil organic carbon

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The organic carbon contents of the 0–15-cm and 15–30-cm layers of conventionally tilled, stubble-mulched and no-tilled soils were compared. Samples from four localities in the Transvaal and Orange Free State were analyzed for organic C by means of two methods...