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12 June 2018 Photo Thabo Kessah
Young researcher to jet out to UK
Mamosa Ngcala who leaving for the United Kingdom on 31 July 2018.

When Mamosa Ngcala jets out to the United Kingdom (UK) on 31 July 2018, she will not only be doing research and improving herself academically at the Durham University, but she will also put yet another feather in the growing research profile cap of the Qwaqwa Campus.

“I am looking forward to my study visit under the mentorship of Dr Steve Chivasa, my supervisor’s co-researcher in the Department of Biosciences at the renowned Durham University. This will enable me to grow academically as much as it will get me closer to concluding my research on climate change and food security,” said Mamosa, a master’s student in Science (Botany). Her supervisor is Dr Rudo Ngara.

“Going there will fast-track my research that looks at how food security can be enhanced in as far as growing sorghum is concerned. This study in Plant Biotechnology aims to identify heat responsive genes in sorghum, which is the fifth most important cereal crop in the world. The information obtained in this study will serve as fundamental knowledge regarding molecular responses of plants to heat stress and will be used in breeding programmes to develop crops that can tolerate high temperature stress conditions caused by climate change, thus resulting in high crop yield in agriculture as well as food security,” she said. She will be in the UK until 12 September 2018.

Mamosa has recently won the 3-Minute thesis competition for graduates that was part of the ‘Sorghum in the 21st Century’ international conference held in Cape Town.

Talking about this achievement, she said: “Going head-to-head with PhD students from all over the world gave me extra motivation and drive to do well, and I did. This goes to show that we can achieve whatever we put our minds to. Having to summarise my entire study in three minutes for a non-specialist audience, using one PowerPoint slide, was a challenge that had to be overcome,” said Mamosa. The conference was organised by the Collaborative Research on Sorghum and Millet and the University of Pretoria.

Mamosa graduated with distinction in Botany for her honours degree. She is a member of the Golden Key International Honour Society and Chairperson of the Postgraduate Student Council and is looking forward to advancing her studies to PhD level.

News Archive

Water erosion research help determine future of dams
2017-03-07

Description: Dr Jay le Roux Tags: Dr Jay le Roux

Dr Jay le Roux, one of 31 new NRF-rated
researchers at the University of the Free State,
aims for a higher rating from the NRF.
Photo: Rulanzen Martin

“This rating will motivate me to do more research, to improve outcomes, and to aim for a higher C-rating.” This was the response of Dr Jay le Roux, who was recently graded as an Y2-rated researcher by the National Research Foundation (NRF).

Dr Le Roux, senior lecturer in the Department of Geography at the University of the Free State (UFS), is one of 31 new NRF-rated researchers at the UFS. “This grading will make it possible to focus on more specific research during field research and to come in contact with other experts. Researchers are graded on their potential or contribution in their respective fields,” he said.

Research assess different techniques
His research on water erosion risk in South Africa (SA) is a methodological framework with three hierarchal levels presented. It was done in collaboration with the University of Pretoria (UP), Water Research Commission, Department of Agriculture, Forestry and Fisheries, and recently Rhodes University and the Department of Environmental Affairs. Dr Le Roux was registered for 5 years at UP, while working full-time for the Agricultural Research Council – Institute for Soil, Climate and Water (ARC-ISCW).

Water erosion risk assessment in South Africa: towards a methodological framework
, illustrates the most feasible erosion assessment techniques and input datasets that can be used to map water erosion features in SA. It also emphasises the simplicity required for application at a regional scale, with proper incorporation of the most important erosion-causal factors.

The main feature that distinguishes this approach from previous studies is the fact that this study interprets erosion features as individual sediment sources. Modelling the sediment yield contribution from gully erosion (also known as dongas) with emphasis on connectivity and sediment transport, can be considered as an important step towards the assessment of sediment produce at regional scale. 
 
Dams a pivotal element in river networks

Soil is an important, but limited natural resource in SA. Soil erosion not only involves loss of fertile topsoil and reduction of soil productivity, but is also coupled with serious off-site impacts related to increased mobilisation of sediment and delivery to rivers.

The siltation of dams is a big problem in SA, especially dams that are located in eroded catchment areas. Dr Le Roux recently developed a model to assess sediment yield contribution from gully erosion at a large catchment scale. “The Mzimvubu River Catchment is the only large river network in SA on record without a dam.” The flow and sediment yield in the catchment made it possible to estimate dam life expectancies on between 43 and 55 years for future dams in the area.
 
Future model to assess soil erosion
“I plan to finalise a soil erosion model that will determine the sediment yield of gully erosion on a bigger scale.” It will be useful to determine the lifespan of dams where gully erosion is a big problem. Two of his PhD students are currently working on project proposals to assess soil erosion with the help of remote sensing techniques.

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