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1. Produksie en kwaliteit van ‘n aantal grasspesies in die Combretum‐veld van noord‐transvaal

   Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.A. Pieterse --- Departement Plantproduksie, Fakulteit Landbouwetenskappe, J.O. Grunow --- Departement Plantproduksie, Fakulteit Landbouwetenskappe,

   Die produksie en kwaliteit van vyf spesies (Themeda triandra, Heteropogon contortus, Digitaria eriantha var. pentzii, Schmidtia pappophoroides en Eragrostis rigidior) is by verskillende frekwensies van ontblaring op ontbosde en onontbosde bosveld gemeet. In die daaropvolgende jaar is intensiteit bygebring met...

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2. The regrowth of Colophospermum mopane following clearing

   Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: R.J. Scholes --- Department of Botany, Republicof South Africa

   The recovery of cleared Colophospermum mopane thicket in the eastern Transvaal lowveld, to a level where its effect on grass production is similar to that in the pre‐cleared state, occurs within fourteen years. Based on certain assumptions, the ‘effective duration’...

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3. 

   The effect of accessibility and value addition on the costs of controlling invasive alien plants in South Africa: A three-species system dynamics model in the fynbos and grassland biomes

   Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Douglas J Crookes --- , South Africa James N Blignaut --- , South Africa David C Le Maitre --- , South Africa

   We developed a two-biome (grasslands and fynbos) system dynamics model simulating invasions of three invasive alien plant species – black wattle (Acacia mearnsii) and two pine species (Pinus patula and Pinus pinaster) – and some of the consequences. The model...

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