Articles by Author: Owen Rubaba

Search results for Owen Rubaba

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  1. Scope of research on <em>Parthenium hysterophorus</em> in Africa

    Scope of research on <em>Parthenium hysterophorus</em> in Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Parthenium (Parthenium hysterophorus) is an invasive plant that invades farm and grazing lands, and affects biodiversity, animal and human health, agricultural productivity and food security. The plant is native to the Americas, but was introduced to Africa, Asia and Australia...
  2. The ecological potential of the kudu for commercial production in savanna regions

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    This paper considers the choice of a browsing ungulate to supplement cattle in savanna regions susceptible to problems of bush encroachment, and evaluates the kudu in particular. Relevant aspects of its ecology considered include (i) the vegetation components utilized at...
  3. Plant palatability assessment and its implications for plantā€herbivore relations

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    An objective method used to assess the palatability of the foliage of woody plant species to kudus, impalas and goats is described. Observations were made on the feeding behaviour of tame animals in the Nylslvey Nature Reserve in northern Transvaal...
  4. Veld condition and animal performance: Application of an optimal foraging model

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    An optimal foraging model was used to predict food ingestion rate, food digestion rate and animal energy gains relative to requirements as functions of dietary composition. Energy gains were maximized by ranking food types in order of their effective value,...
  5. Manipulasie van sori-voorkoms op <em>Rumohra adiantiformis</em> blare

    Manipulasie van sori-voorkoms op <em>Rumohra adiantiformis</em> blare

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Rumohra adiantiformis (G. Forst.) Ching, die Seweweeks- of Knysnavaring se gewildheid as snyloofproduk neem vinnig toe. Onder natuurlike groeitoestande ontwikkel die Knysnavaring slegs beperkte hoeveelhede sori, terwyl groot hoeveel- hede sori ontwikkel wanneer die varing onder skadunet verbou word. Die...
  6. Editorial Notice

    Editorial Notice

    Item type: Journal Article • Journal: The Southern African Forestry Journal
  7. Editorial Message

    Editorial Message

    Item type: Journal Article • Journal: The Southern African Forestry Journal