Browsing Doctoral Degrees (Soil Science) by Issue Date
Now showing items 1-20 of 38
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Soil acidity and liming in Natal.
(1970)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.
(1972)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.
(1976)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 ... -
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. ... -
Sodium, cation exchange and crop response in acid KwaZulu-Natal soils.
(2000)In many acid, highly leached South African soils, Na levels are very low. Applications of Na to highly leached soils may be advantageous in some situations as Na has been shown to interact with soil acidity, P availability, ... -
Bioremediation of Atrazine- and BTX-contaminated soils : insights through molecular/physiological characterization.
(2001)Most natural products and xenobiotic molecules, irrespective of their molecular or structural complexity, are degradable by some microbial species/associations within particular environments. Atrazine- and selected petroleum ... -
Effects of the land disposal of water treatment sludge on soil physical quality.
(2001)An essential step in producing "drinking" water is to precipitate the suspended and dissolved colloids through the addition of flocculents such as lime, ferric chloride, aluminium sulphate and/or poly-electrolytes. The ... -
The effect of various crop residue management practices under sugarcane production on soil quality.
(2003)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 ... -
Investigations into aluminium toxicity and resistance in cynodon dactylon using invitro techniques.
(2004)Aluminium toxicity is a significant limiting factor to agricultural crop production globally, promoting the need for plants that are resistant to low pH and high Al3 +, Current literature suggests that Al3 + inhibits plant ... -
Use of organic amendments as ameliorants for soil acidity in laboratory and field experiments.
(2004)Laboratory studies and field trials were carried out to investigate the effect of addition of some organic residues to acid soils on soil pH, exchangeable and soluble AI, nutrient status, microbiological and biochemical ... -
Some soil chemical and fertility aspects of the land disposal of a water treatment residue on selected soils of KwaZulu-Natal, South Africa.
(2005)The environmental and agricultural viability of land disposal of a water treatment residue (WTR) from the Midmar Water Treatment Works of Umgeni Water was investigated by determining answers to four broad questions: 1. ... -
Revegetation and phytoremediation of tailings from a lead/zinc mine and land disposal of two manganese-rich wastes.
(2007)The original aims of this project were to investigate the potential for phytoremediation, with emphasis on metal accumulation, of three contrasting industrial processing wastes. These were tailings material (PT) from the ... -
The effects of compaction and residue management on soil properties and growth of Eucalyptus grandis at two sites in KwaZulu-Natal, South Africa.
(2010)Concerns have been raised over the long-term site productivity (LTSP) of short rotation plantation forests, such as those of Eucalyptus, in South Africa. This is because diminished productivity of long rotation plantations ... -
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 ... -
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 ... -
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 ...