Articles by Author: Nancy Scheper Hughes

Search results for Nancy Scheper Hughes

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  1. The effectiveness of Langebaan rock phosphate and superphosphate in two acid, phosphate-deficient soils

    The effectiveness of Langebaan rock phosphate and superphosphate in two acid, phosphate-deficient soils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Acid, P-deficient soils with a large capacity to immobilize P favour the rapid decomposition of apatite. Such soils are widespread in the east of South Africa and the possibility exists that Langebaan rock phosphate (Langfos) may be a more cost-effective...
  2. The use of a sewage sludge as a fertilizer for wheat in a glasshouse pot experiment

    The use of a sewage sludge as a fertilizer for wheat in a glasshouse pot experiment

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Acid soil infertility is a major limiting factor in crop production on soils along the eastern seaboard of South Africa. Invariably this problem is addressed by effectively liming the topsoil with little influence on subsoil acidity. A study was conducted...
  3. Maize response to Langebaan rock phosphate—superphosphate mixtures under glasshouse conditions

    Maize response to Langebaan rock phosphate—superphosphate mixtures under glasshouse conditions

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A previous investigation showed that Langebaan rock phosphate (Langfos) was not an effective substitute for superphosphate. However, in the light of reports that P availability is enhanced when phosphate rock (PR) and monocalcium phosphate are combined, an improvement in Langfos...
  4. The effects of leather tannery sludge on the leachates from soil columns

    The effects of leather tannery sludge on the leachates from soil columns

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Leather tannery sludge from a chrome-tanning plant was added to the surface horizon of a typic haplustox from South Africa at rates equivalent to 0, 10 and 100 t ha−1. Leaching columns were set up with 100 mm of the...
  5. Assessment of phosphorus availability in soils fertilized with Langebaan rock phosphate or superphosphate

    Assessment of phosphorus availability in soils fertilized with Langebaan rock phosphate or superphosphate

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Problems currently exist in the interpretation of soil test values for soils fertilized with rock phosphate. This study was undertaken to compare the ability of four extradants (Ambic, Bray 1, Mehlich 3 and modified Truog) to assess plant available phosphorus...
  6. Improved criteria for classifying hydric soils in South Africa

    Improved criteria for classifying hydric soils in South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    There is an increasing awareness of the ecological and agricultural importance of hydric (wetland) soils. Because of the scarcity of information in South Africa, this study aimed to critically examine systems currently being applied to the hydric soils of South...
  7. Use of solid waste bagasse from a paper mill as an organic amendment and its effect on some soil properties: a case study

    Use of solid waste bagasse from a paper mill as an organic amendment and its effect on some soil properties: a case study

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    At a paper mill in KwaZulu-Natal, South Africa bagasse waste was disposed of by burying it in a layer resulting in variable sugar cane growth. The waste was mostly organic fibres, had a high water holding capacity, and contained small...
  8. Changes in chemical properties and temperature during the degradation of organic wastes subjected to simple composting protocols suitable for small-scale farming, and quality of the mature compost

    Changes in chemical properties and temperature during the degradation of organic wastes subjected to simple composting protocols suitable for small-scale farming, and quality of the mature compost

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Despite the high cost of chemical fertilizers and pesticides, composting is not widely practiced in many rural communities in South Africa. To demonstrate the simplicity and benefit of composting, four composting protocols were selected, based on technology and resources available...
  9. Soil mineralogy research in South Africa, 1978 to 2002 - a review

    Soil mineralogy research in South Africa, 1978 to 2002 - a review

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Over 160 publications that contain mineralogical information were produced in the last 25 years of which about half were published in national and international journals. In many articles mineralogical data were presented but not discussed. Most studies were concerned with...