Articles by Keyword: Seasonal Variations

Search results for Seasonal Variations

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  1. Spatial and temporal variation in cadmium body loads of four intertidal invertebrates from False Bay, South Africa

    Spatial and temporal variation in cadmium body loads of four intertidal invertebrates from False Bay, South Africa

    Item type: Journal Article • Journal: African Zoology
    Increasing urbanization and industrialization along the coastal areas of False Bay in South Africa can endanger coastal ecosystems because of increasing metal pollution. To obtain baseline data on contamination levels in the intertidal zone, cadmium (Cd) body loads of four...
  2. Seasonal habitat requirements of Lemon Dove (<em>Aplopelia larvata</em>) in coastal forest: camera-trap surveys of a reclusive species

    Seasonal habitat requirements of Lemon Dove (<em>Aplopelia larvata</em>) in coastal forest: camera-trap surveys of a reclusive species

    Item type: Journal Article • Journal: African Zoology
    The modification of natural habitats requires behavioural plasticity, which may be challenging for ‘specialist’ species. Quantifying habitat requirements and behavioural responses of specialists to landscape transformation is thus a priority for baseline data to inform conservation practices. Using camera-trap surveys...
  3. Effects of seasonal variation, group size and sex on the activity budget and diet composition of the addax antelope

    Effects of seasonal variation, group size and sex on the activity budget and diet composition of the addax antelope

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Behaviour and diet composition are critical elements in conservation biology within the scope of reintroduction programs. Here we focused on addax (Addax nasomaculatus), a Critically Endangered antelope species, in the Jbil National Park, Tunisia. In this study, we advanced the...
  4. Micropropagation <em>of Eucalyptus radiata ssp. radiata</em> Using Explants from Mature and Coppice Material

    Item type: Journal Article • Journal: South African Forestry Journal
    Nodes from young field-grown coppice regrowth and branches of a mature tree of Eucalyptus radiata ssp. radiata were cultured on a MS medium containing BA and NAA. BA at 0,5 mg/ℓ and NAA at 0,01-0,1 mg/ℓ were most effective in...
  5. The relative yield potential of westerwolds and Italian ryegrass cultivars in autumn‐planted pastures and their flowering patterns following spring‐establishment

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Herbage yields from autumn‐planted Lolium multiflorum cultivar trials conducted in the Natal Mist Belt indicated that, in general, the Westerwolds ryegrass cultivars had greater yield potential than the Italian ryegrass cultivars during the cold winter months. Conversely, the Italian ryegrass...
  6. ‘n Vergelyking van wei‐ en voergewasse vir die produksie van slaglammers in die Pretoria‐ Witwatersrand‐Vereeniging(PWV)‐gebied

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    A comparison of pasture and fodder crops for the production of slaughter lambs in the Pretoria‐Witwatersrand‐Vereeniging (PWV) area. A number of pasture and fodder species were evaluated for the production of mutton with weancr lambs. Animal performance and meat production...
  7. Responses of Italian ryegrass to phosphorus on highly‐weathered soils

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Italian ryegrass (Loliwn multiflorum cv. Midmar) responses to fertilizer P were studied in field experiments under irrigation on highly‐weathered ferrallitic soils at two localities in Natal. Each experiment was conducted over two seasons (1985 and 1986), the pasture being re‐established...
  8. Seasonal uptake and distribution of nutrient elements by kiwifruit vines 1. Macronutrients

    Seasonal uptake and distribution of nutrient elements by kiwifruit vines 1. Macronutrients

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Dry matter production and uptake and distribution of macronutrients in kiwifruit vines (Actinidia deliciosa (A. Chev.) C.F. Liang et A.R. Ferguson var. deliciosa) cv. Hayward were studied in sand culture. The total dry mass of the kiwifruit vine increased sharply...
  9. Seasonal uptake and distribution of nutrient elements by kiwifruit vines 2. Micronutrients

    Seasonal uptake and distribution of nutrient elements by kiwifruit vines 2. Micronutrients

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Uptake and distribution of micronutrients by kiwifruit vines (Actinidia deliciosa (A. Chev.) C.F. Liang et A.R. Ferguson var. deliciosa) cv. Hayward were studied in sand culture. The period of rapid accumulation of different micronutrients differed substantially. Zinc was accumulated mainly...
  10. The yield response of annual ryegrass (<em>Lolium multiflorum</em>) to varying nitrogen fertilizer application strategies

    The yield response of annual ryegrass (<em>Lolium multiflorum</em>) to varying nitrogen fertilizer application strategies

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Annual ryegrass (Lolium multiflorum LAM. cv. Midmar) pastures were established on three sites, representing the Avalon, Katspruit and Inanda soil forms, with cut-plot experimentation over a period of four years (1987 - 1990). Nitrogen fertilizer was top-dressed at 0, 200,...