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28 October 2025 | Story Andile Mbowana | Photo Supplied
PhD candidates at the 2025 National 3MT Competition, hosted at the University of the Free State.

The University of the Free State Centre for Graduate Support (CGS) hosted the 2025 National Three-Minute Thesis (3MT) Competition on 24 October in the Albert Wessels Auditorium, bringing together some of South Africa’s brightest PhD minds under one roof. The annual event, which has become a highlight on the national academic calendar, challenges doctoral candidates from universities across the country to present their complex research in just three minutes, using language accessible to a non-specialist audience. 

This year’s competition drew impressive presentations from top scholars representing various disciplines – from health sciences and agriculture to humanities – all showcasing the depth and diversity of South Africa’s research landscape.

Delivering the keynote address, Prof Vasu Reddy, Deputy Vice-Chancellor: Research and Internationalisation at the UFS, reflected on The Essence of Postgraduate Studies and Success in South Africa. He emphasised that postgraduate research plays a critical role in shaping innovation and addressing the country’s most pressing challenges. “As postgraduates, you represent a powerful tool of transformation, equity, and innovation, and every thesis is a story of resilience and a long journey of research,” he said. Prof Reddy also talked about how “competitions like the 3MT not only celebrate research excellence but also teach scholars how to communicate their ideas to inspire real-world impact,” praising the competition for opening opportunities for postgraduate scholars. 

The University of the Free State was represented by two candidates, Rentia du Plessis from the Faculty of The Humanities, who presented her 3MT title, Exploring Instructional Communication Strategic for Holistic Student Development, and Naquita Fernandes from the Faculty of Economic and Management Sciences, with her 3MT title, Triggering Online Review Generation Behaviour

Other universities, such as the Nelson Mandela University, Unisa, the University of KwaZulu-Natal, the University of the Western Cape, the University of Johannesburg, and the University of Pretoria, were also present.

After a series of captivating presentations, Robinah Nakawunde from Stellenbosch University claimed the top prize. Representing the Faculty of Medicine and Health Sciences, her presentation titled, Cured but Not Healed: Uncovering the Lung’s Struggles after TB, captured the attention of both the judges and the audience. Her research sheds light on how pulmonary tuberculosis continues to affect lung function even after successful treatment, highlighting the need for improved post-TB health-care interventions.

The first runner-up position went to Aaron Harvey from the University of Pretoria’s Faculty of Natural and Agricultural Sciences, whose research explores how avocado plants fight root rot disease using RNA interference mechanisms. His presentation, titled How Avocado Cells Fight Against the Root Rot Disease Caused by Phytophthora cinnamomi, Using RNAi Gatekeepers, impressed the judges with its clarity and scientific depth.

Morgan Lee from the University of Cape Town’s Faculty of Humanities took home the second runner-up prize. Her presentation, Locked In: The Hidden Barriers to Sustainable Agriculture, tackled the challenges facing South Africa’s commercial grain sector in transitioning towards more sustainable practices, offering insights that bridge environmental and social considerations.

The 2025 3MT National Competition once again demonstrated the power of concise, impactful communication in research. As the curtain closed, it was evident that South Africa’s future of research and innovation remains in capable hands, ones that can not only investigate deeply, but also explain passionately

News Archive

Research helps farmers save with irrigation
2017-02-15

Description: Irrigation research Tags: Irrigation research

Marcill Venter, lecturer in the Department of
Agricultural Economics at the University of the
Free State, has developed the mathematical
programming system, Soil Water Irrigation
Planning and Energy Management in order to
determine irrigation pump hours.
Photo: Rulanzen Martin

Her advice to farmers is that they should make sure they are aware of the total cost (investment and operating costs) of an irrigation system. In most cases the investment cost is low, but the operating cost over the lifetime of the system is high.

“It is very important to have a look at the total cost and to install the most economic system,” says Marcill Venter, lecturer at the University of the Free State (UFS), who has done research on the economic sustainability of water-pipe systems.

Irrigation systems important components for farming
This research comes at a time when many farmers are relying on their irrigation systems due to persistent drought and low rainfall during 2016. South Africa has also experienced an abnormal increase in electricity tariffs in recent years. Due to tariff increases which threaten the future profitability of irrigation producers, the Water Research Commission (WRC) has launched and financed a project on the sustainable management of irrigation farming systems. “I had the opportunity to work on the project as a researcher,” says Venter.

The heart of every irrigation system is the water pipes that bring life to crops and livestock, and this is what Venter’s research is about. “Water pipes are part of the whole design of irrigation systems. The design of the system impact certain factors which determine the investment and operating costs,” she says.

Mathematical system to help farmers
Venter and Professor Bennie Grové, also from the Department of Agricultural Economics at the UFS, designed the Soil Water Irrigation Planning and Energy Management (SWIP-E) programming model as part of the WRC’s project, as well as for her master’s degree. “The model determines irrigation pump hours through a daily groundwater budget, while also taking into account the time-of-use electricity tariff structure and change in kilowatt requirements arising from the main-line design,” says Venter. The model is a non-linear programming model programmed in General Algebraic Modeling System (GAMS).

Design of irrigation system important for sustainability

The main outcome of the study is that the time-of-use electricity tariff structure (Ruraflex) is always more profitable than the flat-rate structure (Landrate). The interaction between the management and design of a system is crucial, as it determines the investment and operating costs. Irrigation designers should take the investment and operating cost of a system into account during the design process. The standards set by the South African Irrigation Institute (SAII) should also be controlled and revised.

Water-pipe thickness plays major role in cost cuts
There is interaction between water-pipe thickness, investment and operating costs. When thinner water pipes are installed, it increases the friction in the system as well as the kilowatt usage. A high kilowatt increases the operating cost, but the use of thinner water pipes lowers the investment cost. Thicker water pipes therefore lower the friction and the kilowatt requirements, which leads to lower operating costs, but thicker pipes have a higher investment cost. “It is thus crucial to look at the total cost (operating and investment cost) when investing in a new system. Farmers should invest in the system with the lowest total cost,” says Venter.

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