Articles by Keyword: Compaction

Search results for Compaction

We found 18 results for you
  1. 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...
  2. The Impact of Harvesting Operations on Timber Quality: Causes and Remedies

    Item type: Journal Article • Journal: South African Forestry Journal
    Forests are devastated daily to satisfy the world's timber demands. Tropical forests throughout the world are exploited and endangered. An obligation therefore exists to avoid damage to timber and minimise waste wherever possible.
  3. A preliminary investigation of woody plant increase in the western Transvaal and implications for veld assessment

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The relationships between tree density and indices of pasture and soil condition were examined in Western Transvaal grasslands where Acacia karroo had increased following disturbance. The correlation between tree density and pasture condition was not linear, indicating a threshold in...
  4. A preliminary investigation of area‐selective grazing in the Southern Tall Grassveld of Natal

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The consequences of area‐selective grazing by cattle under three stocking rates and at two sites in the Southern Tall Grassveld of Natal were investigated. Soil compaction was found to significantly distinguish area‐selected patches from non‐selected veld (P≤0.01), while non‐significant differences...
  5. Causes, adverse effects and control of soil compaction

    Causes, adverse effects and control of soil compaction

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The causes, adverse effects and control of soil compaction, with special reference to Southern African conditions, are reviewed. The main causes for soil compaction are the well-rounded and -sorted fine sand fraction of the aeolian sandy soils combined with compression...
  6. The effect of particle-size distribution on the suitability of sandy soils for sports fields

    The effect of particle-size distribution on the suitability of sandy soils for sports fields

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The compaction of the topsoil layer of sports fields can modify soil properties such as permeability, resistance to root penetration, aeration and water-holding capacity. The feasibility of predicting these properties from particle size distribution parameters of sandy soils was investigated...
  7. Changes in a Doveton clay loam after 12 years of direct-drill maize production

    Changes in a Doveton clay loam after 12 years of direct-drill maize production

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    After 8 years of direct-drill maize production at Cedara on a Hutton/Doveton clay loam (Typic Plinthustult) it was found that the top 120-mm layer had become somewhat denser and that organic carbon levels in the top 20 mm were higher...
  8. The effect of soil compaction on the water retention characteristics of soils in forest plantations

    The effect of soil compaction on the water retention characteristics of soils in forest plantations

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A study was carried out to evaluate the relative effects of soil compaction on the water retention characteristics of a range of soils in forest plantations in the summer rainfall regions of South Africa. In all cases compaction resulted in...
  9. Soil compaction by tractor tillage in horticultural fields at Molelwane research farm, Mafikeng, North West Province

    Soil compaction by tractor tillage in horticultural fields at Molelwane research farm, Mafikeng, North West Province

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The study was prompted by concerns that soil compaction in horticultural fields at the University research farm was limiting the performance of fruit trees and vegetable crops after fifteen years of conventional tillage with tractors. Soil penetrometer resistance and bulk...
  10. Fire and the dynamics of a semi-arid grassland: influence on soil characteristics

    Fire and the dynamics of a semi-arid grassland: influence on soil characteristics

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    The short-term impact of fire burning with the wind (head fire) and against the wind (back fire) on soil characteristics (soil-water content, soil compaction, soil temperature, organic matter, pH, exchangeable Ca, Mg, K, Na and extractable P) were determined in...