Articles by Keyword: Survival

Search results for Survival

We found 59 results for you
  1. Field Performance of Micropropagated and Macropropagated <em>Eucalyptus</em> Hybrids

    Item type: Journal Article • Journal: South African Forestry Journal
    Plantlets derived, via both in vitro micropropagation and from rooted cuttings, from seven different Eucalyptus hybrid genotypes were assessed for their field performance in Kwambonambi, KwaZulu Natal. Tree survival, height, mean annual increment, diameter at breast height and size uniformity...
  2. Die rol van koolhidraatreserwes by kwekeryprestasie van appelhardehoutsteggies

    Die rol van koolhidraatreserwes by kwekeryprestasie van appelhardehoutsteggies

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Sterk eenjarige winterlote van 'n tien-jaar-oue Merton-793-moederplantasie is opgedeel in steggies van 30 cm lengte. Die basale steggie is gesny vanaf die punt van aanhegting, met die tweede en derde steggie in opeenvolgende posisies nader aan die lootpunt. Die posisie...
  3. Ecological factors affecting the early development of seedlings of three <em>Acacia</em> species from Ethiopia

    Ecological factors affecting the early development of seedlings of three <em>Acacia</em> species from Ethiopia

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Three Acacia species from Ethiopia, namely Acacia nubica, A. seyal and A. horrida, were tested for growth and resistance to drought during the establishment phase in glasshouse and laboratory conditions. The experiments showed that each species has different preferences for...
  4. Survival of <em>Ralstonia solanacearum</em> biovar 2 in soil under different cropping systems

    Survival of <em>Ralstonia solanacearum</em> biovar 2 in soil under different cropping systems

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Survival of Ralstonia solanacearum biovar 2 (race 3) was monitored in an artificially infested field over a five year period. Four cultural practices (maize monoculture, potato monoculture, bare fallow and weed-fallow) were applied. Ralstonia populations in the soil were quantified...
  5. Effect of microencapsulated alachlor on South African sunflower (<em>Helianthus annuus</em> L.) cultivars

    Effect of microencapsulated alachlor on South African sunflower (<em>Helianthus annuus</em> L.) cultivars

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The microencapsulated formulation of alachlor is becoming increasingly popular for use on sunflower in South Africa, where it is registered for use at a rate of 1.54 to 1.92 kg ai ha−1. Some injury symptoms, apparently herbicide induced, have been...
  6. Seasonal and varietal effects on tiller population development of sugarcane (<em>Saccharum Officinarum</em> L.)

    Seasonal and varietal effects on tiller population development of sugarcane (<em>Saccharum Officinarum</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Tillers carry leaves, determine leaf area index and indirectly influence the amount of photosynthetically active radiation (PAR) intercepted by the sugarcane canopy. Tillers develop into stalks, the sink for the products of photosynthesis. The objective of this study was to...
  7. Palmer Drought Indices and Their Application to Plantation Establishment Strategies

    Palmer Drought Indices and Their Application to Plantation Establishment Strategies

    Item type: Journal Article • Journal: The Southern African Forestry Journal
    Palmer drought models are introduced as an objective measure of monthly moisture conditions and their application for forestry research is discussed. A case-study showed that Palmer Hydrological Drought Index was preferred to Palmer Drought Severity Index for deciding on establishment...
  8. THE EFFECT OF CONSTANT TEMPERATURES ON THE HATCHING OF EGGS AND SURVIVAL OF THE FRESHWATER SNAIL <em>BIOMPHALARIA GLABRATA</em> (SAY)

    THE EFFECT OF CONSTANT TEMPERATURES ON THE HATCHING OF EGGS AND SURVIVAL OF THE FRESHWATER SNAIL <em>BIOMPHALARIA GLABRATA</em> (SAY)

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The incubation period and percentage hatching of eggs of pigmented and unpigmented Biomphalaria glabrata at constant temperatures were investigated in the range 14 °C to 34 °C. In order to determine the influence of extreme temperatures on adult snails, specimens...
  9. SOME OBSERVATIONS ON THE FISH LIFE IN A SEASONAL SAND RIVER

    SOME OBSERVATIONS ON THE FISH LIFE IN A SEASONAL SAND RIVER

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Five fish species were collected in a seasonal sand river that had migrated upstream more than 150 km from the permanent Limpopo River. The population structure indicated that mainly juveniles had taken part in this colonisation. No fish were collected...
  10. Impact of goat browsing on <em>Aloe ferox</em> in a South African savanna

    Impact of goat browsing on <em>Aloe ferox</em> in a South African savanna

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    The extent and impact of the utilisation of Aloe ferox by Boer goats during winter in a South African savanna was determined using a plant-based approach. All Aloe plants rooted within the transects were eaten by goats, with small plants...