Articles by Keyword: Growing Season

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  1. Minimum nagtemperatuur en groeiseisoenlengte van katoenproduserende gebiede in Suid-Afrika

    Minimum nagtemperatuur en groeiseisoenlengte van katoenproduserende gebiede in Suid-Afrika

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    'n Bewegende gemiddelde daaglikse minimum nagtemperatuur, T[mbar][nbar] (per vyf dae) is oor 8–15 j vir 23 weer- stasies bereken wat verspreid in die katoenproduserende gebiede van die Republiek van Suid-Afrika aanwesig is. As onderste temperatuurdrempel, of basistemperatuur waarby groei van...
  2. Savanna browse production. 1: Determinants and measurement

    Savanna browse production. 1: Determinants and measurement

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    With the rapid expansion of wildlife ranching and conservation in South African savannas and the resultant increase in multi-species grazing and browsing systems, information on browse production potential is essential for determination of carrying capacity. This study, conducted on three...
  3. Savanna browse production. 2: Prediction

    Savanna browse production. 2: Prediction

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Browsing herbivores are generally highly selective feeders, selecting for new shoots and young plant material. Determinations of browser carrying capacity are then greatly inflated when based on available browse biomass estimates. Our study was initiated with the aim of modelling...
  4. Propagating <em>Osyris lanceolata</em> (African sandalwood) through air layering: Its potential and limitation in Tanzania

    Propagating <em>Osyris lanceolata</em> (African sandalwood) through air layering: Its potential and limitation in Tanzania

    Item type: Journal Article • Journal: The Southern African Forestry Journal
    Propagation of African sandalwood (Osyris lanceolata) by air layering (marcotting) was investigated at Sao Hill, Tanzania, aiming at providing an alternative propagation technique to the use of seeds or cuttings that germinate or root poorly. Air layers were initiated on...
  5. Season and phosphorus age effects on the relationship between maize yield and phosphorus soil test on a highly weathered soil

    Season and phosphorus age effects on the relationship between maize yield and phosphorus soil test on a highly weathered soil

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    This paper discusses data obtained from a long-term N, P, K field experiment with maize (Zea mays L.) on a Normandien clay loam (Plinthic Paleudult) near Newcastle, Natal. After eight seasons plots were split, sub-plots being allowed either to rundown...
  6. Season of application and glyphosate formulation as factors influencing the efficacy of glyphosate on phyllode-bearing Australian acacias

    Season of application and glyphosate formulation as factors influencing the efficacy of glyphosate on phyllode-bearing Australian acacias

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Invasive phyllode-bearing Australian acacias are more difficult to control chemically than true-leaved acacias. Indications were that season of application influenced the efficacy of herbicides when used against these plants. In this experiment two formulations of glyphosate (with low and high...
  7. Die gebruik van groeireguleerders om die blomperiode van katoen te wysig

    Die gebruik van groeireguleerders om die blomperiode van katoen te wysig

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Katoengebiede in Suid-Afrika, hoër as 950 m bo seevlak, het 'n kort groeiseisoen indien laat in November geplant word. Die bydrae van groeireguleerders en verbouings praktyke om rypwording van laat geplante katoen te verhaas en die uitwerking daarvan op veselgehalte,...
  8. Die invloed van saaityd op koring in 'n Mediterreense klimaat I. Fenologiese ontwikkeling

    Die invloed van saaityd op koring in 'n Mediterreense klimaat I. Fenologiese ontwikkeling

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Koringkultivars se aanpassing word grootliks bepaal deur 'n gepaste fenologie en dit word sterk deur saaityd beïnvloed. Om verskille in opbrengs beter te kan verklaar, is kennis van die groeiduurtes van die verskillende ontwikkelingsfases van koring noodsaaklik. Min inligting oor...
  9. Effects of nitrogen, phosphorus and potassium nutrition on seasonal tannin content of bush tea (<em>Athrixia phyliciodes</em> DC.)

    Effects of nitrogen, phosphorus and potassium nutrition on seasonal tannin content of bush tea (<em>Athrixia phyliciodes</em> DC.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Three trials were conducted over four seasons (summer, autumn, winter and spring) to determine the nutritional requirements of bush tea regarding nitrogen (N), phosphorus (P) and potassium (K) and the influence of these nutrients on tannin content of cultivated bush...
  10. Aspects of the population biology of <em>Octopus vulgaris</em> in False Bay, South Africa

    Aspects of the population biology of <em>Octopus vulgaris</em> in False Bay, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The population biology of the octopus Octopus vulgaris was studied from specimens collected by SCUBA in False Bay, South Africa, between 1997 and 1998. In all, 83% of the specimens collected were found in shelter. Small octopuses were more active...