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Browsing Natural and Agricultural Sciences by Supervisor "Tesfamariam, Eyob Habte"
Now showing items 1-11 of 11
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(University of Pretoria, 2022)Climate change is expected to result in rainfall reduction in South African semi-arid and arid rangelands and may have severe ecological consequences. This rainfall reduction may cause irreversible and substantial ...
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(University of Pretoria, 2023)Lack of effective wastewater management strategies poses a serious threat to the environment and human health around the world. South Africa's freshwater resources are threatened by human influence and dwindling at an ...
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Greenhouse gas emissions in croplands and downslope riparian buffer strips with varying vegetation (University of Pretoria, 2022-07-29)Vegetated riparian buffer areas are implemented as an intervention to intercept, retain and process diffuse non-point source pollutants (NPS), including nitrate (NO3-), phosphorus (P), herbicides, and pesticides emitted ...
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(University of Pretoria, 2021)Biosolids are the transformed products of sewage sludge produced through various sludge stabilization processes including drying, dosing and digestion. Biosolids are commonly applied to agricultural lands to improve soil ...
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Partitioning coefficients and solubilities of Cu, Pb and V in selected south African soil horizons (University of Pretoria, 2014)In the past, contaminated soil as a source for water contamination has been largely neglected from the South African legislation. Inconsistent evaluation and remediation of contaminated sites have resulted in many sources ...
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(University of Pretoria, 2015)Rainfall variability in and between seasons, lower soil organic matter content, land degradation, and the associated low biomass yield and poor quality of forage are major constraints to livestock production in the subtropical ...
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(University of Pretoria, 2020-08)World-wide population is rising, and pressure is mounting on already limited resources targeted for agricultural productivity. Resources like water and crop nutrient sources are getting limited every day to sustain the ...
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(University of Pretoria, 2020)Herbage and cattle production in semi-arid regions are primarily controlled by climate variation particularly rainfall variability and secondarily by disturbances such as drought, grazing and fire. These factors interact ...
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(University of Pretoria, 2014-11)The composition of sludge organic matter is mainly influenced by the origin of wastewater. The biochemical composition of sludge could, however, alter from post wastewater treatment drying techniques. Such changes have ...
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(University of Pretoria, 2014)Soils on the Eastern Highveld acidify naturally due to the high rainfall and the use of certain nitrogen fertilizers. Liming materials are used to ameliorate soil acidity. A large fraction of this liming material used is ...
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(University of Pretoria, 2016)Manual plucking is highly labour intensive, occupying almost 70% of the total labour force on tea estates and accounting for approximately 40 - 45% of cost of production. The high labour costs and shortages and the cost ...
Now showing items 1-11 of 11