Articles by Keyword: Seed Limitation

Search results for Seed Limitation

We found 112 results for you
  1. Variation in seed rain from <em>Widdringtonia whytei</em> growing in different conditions on Mulanje Mountain in Malawi

    Variation in seed rain from <em>Widdringtonia whytei</em> growing in different conditions on Mulanje Mountain in Malawi

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Mulanje Mountain is one of the examples of tropical montane landscapes with plant populations varying in size from small fragments of less than 1 ha to riverine strips and stands of more than 100 ha. Seed availability is a potential...
  2. Reproductive biology of the critically endangered tropical tree <em>Talbotiella gentii</em>

    Reproductive biology of the critically endangered tropical tree <em>Talbotiella gentii</em>

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Talbotiella gentii is a critically endangered caesalpiniaceous legume endemic to Ghana, restricted in distribution to the margins of the forest zone where there has been extensive fire damage in recent decades. It occurs as isolated, near-monospecific populations, some of which...
  3. Comparison of <em>Eucalyptus grandis</em> Provenances and Seed Orchards in a Frost Frequent Environment

    Item type: Journal Article • Journal: South African Forestry Journal
    An international provenance trial of Eucalyptus grandis was established in southern Florida in 1980 and measured for growth and frost-tolerance through 8,8 years. The trial compared 20 Australian provenances 1) among themselves and 2) with seed orchard stock from Florida...
  4. Effects of season of burn on shrub survival, regeneration and structure in the Natal Drakensberg

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Four shrub species which tend to invade unburnt grassland were studied in field‐burning trials at Cathedral Peak in the Natal Drakensberg.
  5. Droë massaproduksie van vyf eenjarige <em>Medicago</em>‐genotipes in die sentrale oranje‐vrystaat, soos beinvloed deur planttyd

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Bogrondse droë massa‐opbrengste (DM) van Medicago truncatula, cvv. Cyprus en Jemalong, M. aculeata var. inermis, cv. SA 4438, M. orbicularis, cv. SA 2552 en M. rugosa, cv. Paragosa wat op ses verskillende datums gevestig is, is in ‘n veldproef onder...
  6. Influence of climatic and edaphic factors on the distribution of <em>eragrostis lehmanniana</em> nees in Arizona, USA

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Lehmann lovegrass (Eragrostis lehmanniana Nees) was introduced into Arizona, USA, from South Africa in 1932 and has since been sown throughout the southwestern USA and Northern Mexico. The species is well adapted in southeastern Arizona where it has been sown...
  7. A comparison of a number of annual cool season legumes under dryland conditions in the Dohne Sourveld

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Fifteen annual cool season legumes were compared under dryland conditions on two sites in the Dohne Sourveld. These sites were Dohne, with a mild but dry winter and an average rainfall of 743 mm per year, and Grasslands, a colder,...
  8. The function of the hygroscopic awn of <em>Themeda triandra</em> <sup>1</sup>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The hygroscopic awn of species such as Themeda triandra is widely believed to be a device ensuring the early burial of its seed. This belief has been extensively tested and no tendency for such self‐burial has been found. It has...
  9. The soil seed bank under nasella tussock infestations at Boschberg

    The soil seed bank under nasella tussock infestations at Boschberg

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Nassella tussock (Stipa trichotoma Nees.) has a high annual production of seeds per plant. The total seed bank of all plants counted under a dense nassella infestation varied between 50 000 and 100 000 seeds m−2 surface area (5 cm...
  10. An evaluation of the problem of volunteer ryegrass in seed production

    An evaluation of the problem of volunteer ryegrass in seed production

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    This investigation was conducted to establish the degree and means of eliminating unwanted volunteers of Lolium multiflorum from fields used for seed production of a cultivar of the same species. This information is necessary in order to make recommendations with...