Articles by Author: J G Thompson

Search results for J G Thompson

We found 37 results for you
  1. An Overview of Remote Sensing in Forestry and Related Activities Its Potential Application in South Africa

    Item type: Journal Article • Journal: South African Forestry Journal
    The paper reviews general applications of remotely sensed data within the fields of forestry and environmental, management, and the potential of such data for resource assessment and monitoring.
  2. Behaviour of sesquioxic clay soils subjected to alkaline and saline effluents

    Behaviour of sesquioxic clay soils subjected to alkaline and saline effluents

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effects of disposal of alkaline and saline effluents on sesquioxic red clay soils have been monitored for many years on a site in the eastern Transvaal. Recently a high chloride content effluent with a sodium adsorption ratio (SAR) of...
  3. Sodicity phenomena in red sesquioxic clay subsoils

    Sodicity phenomena in red sesquioxic clay subsoils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Monitoring for many years of the soils of an effluent disposal site in the eastern Transvaal has shown that the disposal of alkaline and saline effluents on red sesquioxic clays has not appreciably affected soil permeability but has brought about...
  4. A comparison of methods used for the extraction of K in soils of the Western Cape

    A comparison of methods used for the extraction of K in soils of the Western Cape

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A number of common soil extractants, mainly those used for soil P, were used to extract K from a range of widely differing soils which occur in the Western Cape; the objective being to evaluate the simultaneous determination of P...
  5. The direct determination of phosphorus in citric acid soil extracts by colorimetry and direct-current plasma emission spectroscopy

    The direct determination of phosphorus in citric acid soil extracts by colorimetry and direct-current plasma emission spectroscopy

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of citrate interference on the direct colorimetric determination of P in 1% citric acid soil extracts of a wide range of soils was investigated and compared to that of removing the citric acid by dry ashing. It was...
  6. Large-scale modelling of the South-East Atlantic upwelling system

    Large-scale modelling of the South-East Atlantic upwelling system

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The profitable management of fisheries resources depends largely on an ability to anticipate fish recruitment, growth and distribution. This in turn is determined, to a currently unknown extent, by a reliable predictive ability for changing environmental variables. It is becoming...
  7. OPPORTUNISTIC BREEDING BY THE REDBILLED QUELEA IN EASTERN KENYA

    OPPORTUNISTIC BREEDING BY THE REDBILLED QUELEA IN EASTERN KENYA

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Thompson, J.J. 1993. Opportunistic breeding by the Redbilled Quelea in eastern Kenya. Ostrich 64: 32–37.
  8. SHORT NOTES

    SHORT NOTES

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
  9. Lines around fragments: effects of fencing on large herbivores

    Lines around fragments: effects of fencing on large herbivores

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    People construct fences to delineate land ownership and to control access to land. Fences accomplish several purposes, notable among these are containing livestock or wildlife raised for profit or subsistence, excluding use of vegetation within areas to be conserved and...