Doctoral Degrees (Soil Science)
Recent Submissions
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Long-term fertilizer and sugarcane residue management effects on structural stability of two soil types in South Africa.
(2017)Abstract available in PDF file. -
Land use and land management impact on CO2 emissions from soils in selected smallholder farming systems.
(2016)Abstract available in PDF file. -
Evaluation of extraction based fertilizer recommendations.
(2015)There is a need to improve methods by which nitrogen, phosphorus and potassium are currently recommended. There is a considerable lack of mechanistical justifications for the methods used to recommend these nutrients. Lack ... -
Grassland degradation and rehabilitation of soil organic carbon and nitrogen stocks.
(2015-06-17)Land degradation is widely considered to adversely affect soil fertility, soil quality, constrain productivity, subsequently leading to a decline in soil organic carbon (SOC) and nutrients in soils, yet little is known ... -
Characteristics of sesquioxidic soils.
(2014-11-11)Sesquioxidic soil clays from Oxisols in South Africa, Australia and Brazil, and two clays from Andosols in Japan and New Zealand, were investigated by XRD, OTA, IR, EM and quantitative mineralogical analysis. The ... -
Soil acidity and liming in Natal.
(2014-11-11)1. Effects of Aluminium Toxicity and Phosphorus Fixation on Crop Growth on Oxisols in Natal Simple, routine methods for estimating exchangeable Al and P fixing capacity of acid soils are described. A glass-house study ... -
Factors affecting nitrogen utilization by sugarcane in South Africa.
(2014-11-11)TIhe response of sugarcane to applied N in South Africa varies considerably from one soil to another, particularly in the plant crop. Responses to fertilizer N by ratoon cane are generally much greater than those given ... -
Soil physical factors affecting root growth and maize yield in four Rhodesian soils.
(2014-09-23)The platinum microelectrode technique for measuring oxygen flux in soils has been reviewed. Shortcomings in the existing technique and instrumentation have been discussed. The new instrumentation, electrode standardization ... -
Occurrence and properties of iron and titanium oxides in soils along the eastern seaboard of South Africa.
(1978)Abstract available on PDF file. -
Estimation of hydrological properties of South African soils.
(1983)A computer simulation model of the soil water regime can be a useful research, planning and management tool, providing that the data required by the model are available. Finite difference solutions of the general flow ... -
Some mineralogical, physical and chemical properties of volcanically affected soils under irrigated sugarcane in Tanzania.
(2013)TPC is a 16 000 hectare estate located in Moshi, Tanzania and is currently planted under 8 800 hectares of sugarcane and produces over 60 000 tons of sugar per annum. The influence of volcanic parent material and volcanic ... -
The effect of various crop residue management practices under sugarcane production on soil quality.
(2013-12-02)This study examined the influence of different management practices under sugarcane production on soil chemical, biological and physical properties on a long-term (59yr) field experiment in KwaZulu-Natal. These ... -
A laboratory and glasshouse evaluation of an anaerobic baffled reactor effluent as a nutrient and irrigation source for maize in soils of KwaZulu-Natal, South Africa.
(2013-11-06)Scarcity of water for irrigation is a serious hindrance for small-scale farmers in sub-Saharan Africa. The use of good quality water for irrigation has resulted in increasing pressure on such water which has prompted ... -
Investigation of 2:1 layer silicate clays in selected southern African soils.
(1986)As very little detailed X-ray diffraction investigations have been carried out in South Africa on 2:1 phyllosi1icates in soils, the aim of the present study was to contribute to the knowledge of soil genesis, as well as ... -
Site relationships for Pinus patula in the Eastern Transvaal escarpment area.
(1990)The largest area of commercial timber plantations in southern Africa is situated along the Eastern Transvaal Drakensberg Escarpment north of Nelspruit. The site requirements of tree species in this area are poorly understood. ... -
The effects of land use and management practices on soil microbial diversity as determined by PCR-DGGE and CLPP.
(2011)The environmental impact of anthropogenic disturbances such as agriculture, on the soil ecosystem, and particularly on soil microbial structural and functional diversity, is of great importance to soil health, conservation ... -
An investigation, using synchrotron radiation and other techniques, of the composition of San rock art paints and excavated pigments from Maqonqu shelter, and comparative paint data from three other sites in KwaZulu-Natal, South Africa.
(2011)This study aimed to: 1) characterise the individual San parietal art rock art paint colours; 2) relate paint compositions to erosion susceptibility; 3) determine if paint pigments can be related to pigment samples excavated ...
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