Articles by Keyword: Training Systems

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  1. High-density orchards improve the quality of ‘Songold’ plums from lower, more shaded canopy positions

    High-density orchards improve the quality of ‘Songold’ plums from lower, more shaded canopy positions

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Gel breakdown is a major postharvest problem in ‘Songold’ plums (Prunus salicina Lindl.) that is exacerbated in fruit harvested from lower canopy positions in large trees. Modern high-density orchards with small trees aggressively address this problem through improved light distribution...
  2. Timber Harvesting in South Africa—Past, Present, Future

    Item type: Journal Article • Journal: South African Forestry Journal
    After a short description of South African timber harvesting practices in the past, the present situation in terms of machine population and the current harvesting and extraction methods is discussed in more detail.
  3. Cable Yarding in Southern Africa: An Analysis of its Productivity and Possible Procedure for its Improvement

    Item type: Journal Article • Journal: South African Forestry Journal
    The demand for timber in southern Africa is increasing and this is resulting in the afforestation of areas which require cable yarding when harvested. The demand for cable yarders, essentially fixed skylines, is therefore increasing rapidly. Stress is being placed...
  4. Communal land use and the ‘tragedy of the commons’: Some problems and development perspectives with specific reference to semi‐arid regions of southern Africa

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Traditional communal farming in southern Africa has often been described as unproductive and directly responsible for regional poverty and vegetation degradation. Each aspect of this argument rests on a set of unchallenged assumptions concerning the nature of communal farming. Studies...
  5. The incompatibility of controlled selective grazing systems with farmers’ needs

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Since extension inputs, subsidy schemes and even legislation over several decades were unable to stem the veld deterioration in southern Africa, a renewed attempt was made to identify the causes of the non‐adoption of recommended veld management practices. The hypothesis...
  6. Relations between woody and herbaceous components and the effects of bush‐clearing in southern African savannas

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The relations between woody and herbaceous plants in southern African savannas are reviewed in the context of pastoral use. Current knowledge is summarized, important gaps are indicated and research priorities are suggested. Although all savannas consist of a grass and...
  7. Long-term effects of conservation practices on the nitrogen fertility of a soil cropped annually to wheat

    Long-term effects of conservation practices on the nitrogen fertility of a soil cropped annually to wheat

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Sustainable farming in the semi-arid interior of South Africa requires the adoption of conservation practices to maintain and, if possible, increase soil fertility. The effects of some such practices on the nitrogen fertility of a hydromorphic sandy clay loam soil...
  8. The effects of tillage systems on soil bulk density and penetrometer resistance of a sandy clay loam soil

    The effects of tillage systems on soil bulk density and penetrometer resistance of a sandy clay loam soil

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Concern has been expressed that reduced tillage systems may lead to excessive soil compaction, with a negative impact on crop growth. The objectives of this study were to determine the effects of different tillage systems, namely, minimum tillage (disc and...
  9. Die invloed van grondbewerking op vroeë wortelontwikkeling en biomassa van koringkultivars (<em>Triticum aestivum</em> L.)

    Die invloed van grondbewerking op vroeë wortelontwikkeling en biomassa van koringkultivars (<em>Triticum aestivum</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Dit is bekend dat 'n goeie wortellengte en/of worteldigtheid in die eerste paar weke belangrik is om goeie saailingvestiging te verkry. Die doel van hierdie studie was om die uitwerking van minimumbewerking (wisselgangskotteleg en vlerkskaar), beitelploeg- en konvensionele bewerking op...
  10. Long and short term effects of tillage systems on grain yield, the incidence of diseases and production costs for maize

    Long and short term effects of tillage systems on grain yield, the incidence of diseases and production costs for maize

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of four tillage systems on grain yield of maize, incidence of diseases and production costs was investigated for a Hutton soil in the Natal Midlands from 1982 to 1995. The four tillage systems were no-till (NT), reduced tillage...