Browsing Doctoral Degrees (Soil Science) by Title
Now showing items 1-19 of 19
-
The concentration of selected trace metals in South African soils
(Stellenbosch : University of Stellenbosch, 2007-12)Trace elements occur naturally in soils, usually at low concentrations (<0.1% or <1000 mg kg-1 of the earth’s crust), as a result of weathering and pedogenic processes acting on the rock fragments from which soil develops ... -
The contribution of indigenous vegetables to food security and nutrition within selected sites in South Africa
(Stellenbosch : Stellenbosch University, 2013-12)ENGLISH ABSTRACT: South Africa is rich in biodiversity among which are semi-domesticated vegetable species which are known as wild or indigenous vegetables. These wild indigenous vegetables have been reported to be good ... -
Digital soil mapping techniques across multiple landscape scales in South Africa
(Stellenbosch : Stellenbosch University, 2019-12)ENGLISH ABSTRACT: Digital soil mapping has seen increasing interest due to environmental concerns and increasing food security issues. Digital soil mapping offers a quantitative approach which is cost effective as less ... -
Effect of different biochars on inorganic nitrogen availability
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Biochar (a fine pyrolysed organic material) is an amendment used to increase and sustain productivity, reduce environmental pollution and sequester carbon (C) in soils. Successes were reported in improving ... -
The effect of saline irrigation on selected soil properties, plant physiology and vegetative reproductive growth of Palsteyn appricots (Prunus armeniaca L.)
(Stellenbosch : University of Stellenbosch, 2005-12)Approximately 45% of apricot tree plantings in South Africa are centered on Montagu, Koo and Barrydale in the Little Karoo. Below average production in this area could be ascribed to the deteriorating water quality of ... -
Evaluation of selected legumes for sustainable weed ecology/soil fertility/livestock management interactions in crop-livestock systems of the moist savannah of Nigeria
(Stellenbosch : Stellenbosch University, 2004-03)ENGLISH ABSTRACT: This project aimed at enhancing the net benefit in production systems. It took a holistic approach to evaluate the potential interactions of herbaceous legumes in relation to weed dynamics, soil fertility ... -
Die gronde van die Karoo
(Stellenbosch : Stellenbosch University, 1988)ENGLISH ABSTRACT: Soil information pertaining to one of the most extensive arid and semi-arid areas of South Africa is limited. This area, known as the Karoo, comprises 36 million hectares or 32% of the surface area of ... -
In situ denitrification on nitrate rich groundwater in South Africa
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: South Africa is a water scarce country and in certain regions the quantity of surface water is insufficient to provide communities with their domestic water needs. In many arid areas groundwater is often ... -
Interrelationships among soil water regime, irrigation and water stress in the grapevine (Vitis vinifera L.)
(Stellenbosch : Stellenbosch University, 1984-12)ENGLISH ABSTRACT: No abstract available -
Lipid humification by soil clays
(Stellenbosch : Stellenbosch University, 2019-04)ENGLISH ABSTRACT: We studied three aspects of the natural polymerisation (humification) of lipids by soil clays – namely, the products formed, reaction mechanism and kinetics – at environmental temperatures (c. 20–50°C). ... -
Mapping soil organic carbon stocks by combining NIR spectroscopy and stochastic vertical distribution models : a case study in the Mvoti River Catchment, KZN, South Africa
(Stellenbosch : Stellenbosch University, 2019-02)ENGLISH ABSTRACT: The agricultural and environmental importance of maintaining and increasing soil organic carbon (SOC) has been increasingly recognized globally. To a large extent, this recognition can be attributed to ... -
Mitigation of soil and ground water pollution caused by on-land disposal of olive mill wastewater
(Stellenbosch : Stellenbosch University, 2016-03)ENGLISH ABSTRACT: Olive mill wastewater (OMW) is generated in large quantities, particularly in the regions with a Mediterranean climate where olive oil is produced on a commercial scale. Some producers collect the effluent ... -
Modeling and regulating hydrosalinity dynamics in the Sandspruit river catchment (Western Cape)
(Stellenbosch : Stellenbosch University, 2014-04)ENGLISH ABSTRACT: Bugan, R.D.H. Modelling and regulating hydrosalinity dynamics in the Sandspruit River catchment (Western Cape). PhD dissertation, Stellenbosch University. The presence and impacts of dryland salinity ... -
Reciprocal relationships between vegetation structure and soil properties in selected biomes of South Africa
(Stellenbosch : Stellenbosch University, 2003-12)Please refer to full text to view abstract. -
Remote sensing of salt-affected soils
(Stellenbosch : Stellenbosch University, 2013-03)ENGLISH ABSTRACT: Concrete evidence of dryland salinity was observed in the Berg River catchment in the Western Cape Province of South Africa. Soil salinization is a global land degradation hazard that negatively affects ... -
Sanjeevak as a source of nutrients and phytohormones for production and propagation of plants
(Stellenbosch : Stellenbosch University, 2012-03)ENGLISH ABSTRACT: The use of cowdung as an organic fertilizer in Asian and African agriculture is an ancient practice. This explains its renewed interest, partly due to the financial inability of most farmers to purchase ... -
Soil Formation on the Namaqualand Coastal Plain
(Stellenbosch : University of Stellenbosch, 2008-03)The (semi-)arid Namaqualand region on the west coast of South Africa is wellknown for its spring flower displays. Due to the aridity of the region, soils research has lagged behind that of the more agriculturally productive ... -
Using diluted winery effluent for irrigation of Vitis Vinifera. Cv. Cabernet Saugvignon and the impact thereof on soil properties with special reference to selected grapevine responses.
(Stellenbosch : Stellenbosch University, 2016-03)ENGLISH ABSTRACT: Wine production is an important industry in the Western and the Northern Cape regions of South Africa. Wineries produce large volumes of poor quality wastewater, particularly during harvest. International ... -
Water consumption of South African vineyards : a modelling approach based on the quantified combined effects of selected viticultural, soil and meteorological parameters
(Stellenbosch : Stellenbosch University, 1998-12)AFRIKAANSE OPSOMMING: Normaalweg word slegs een of twee stelle gewasfaktore in kombinasie met 'n verwysingwaterverbuik (ET) vir die beraming van gewas waterverbruik (ET) van wingerde gebruik. As gevolg van variasie tussen ...
