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04 April 2025 | Story Andre Damons | Photo Supplied
Prof Wayne Truter
Prof Wayne Truter, Research Professor at the UFS Centre for Mineral Biogeochemistry, and Executive Management of the UFS Green Futures Hub.

Hosting the South African Circular Agriculture Initiative (SACAI) – an initiative of the Department of Science, Technology and Innovation’s (DSTI) – will help position the Green Futures Hub at the University of the Free State (UFS) as a leader in circularity in agriculture.

The UFS Green Futures Hub was selected to host the SACAI from 1 January 2025-31 March 2026. The funding received will be used to conduct workshops with stakeholders to develop a strategy to strengthen South Africa’s science, technology, and innovation for a circular economy in the agriculture sector.

The SACAI, under the leadership of Prof Wayne Truter, Research Professor at the UFS Centre for Mineral Biogeochemistry, and Executive Management of the UFS Green Futures Hub, aims to advance the principles of the circular economy and modernise agriculture in line with the South African government's aspirations. These goals are outlined in the Science, Technology, and Innovation (STI) Decadal Plan (2022-2032) and the Circular Economy STI Strategy.

 

Elevating the UFS’ visibility

The UFS Green Future Hub is a virtual platform in the Faculty of Natural and Agricultural Sciences (NAS), to facilitate integration and leverage capabilities to facilitate third stream funding and industry collaboration. It provides an interface and support structure for researchers to engage with funders and partners through the Hub.

Prof Truter says it is a great honour and privilege to have been awarded this initiative. “The funding that comes with SACAI will elevate our visibility in agriculture in the country and will help position Green Futures Hub as a leader in circularity in agriculture. A key objective of SACAI is to leverage science, technology, and innovation to enhance the value of the national system of innovation (NSI) within the agriculture sector. 

“The initiative will align with the priorities set out in the Circular Economy STI Strategy (2024-2034), focusing on resource efficiency, regenerative agriculture, sustainable agro-processing, and biorefinery development in South Africa. Through collaborations with other public research institutions, the hub will drive STI implementation in these critical areas,” says Prof Truter.

 

Objectives of SACAI 

The objective of SACAI is to give effect to the (i) circular economy, and (ii) modernising agriculture, aspirations of the South African government. The SACAI aims to advance the principles of the circular economy and modernise agriculture in line with the South African government’s aspirations. 

Simultaneously, Prof Truter explains, the objectives of the SACAI align with the vision of the UFS Green Futures Hub to be a global leader in advancing the understanding and application of sustainable practices for life with land and water, in developing contexts. By leveraging the latest advancements in research, technology, and innovation, the hub aims to create a thriving future where communities harmonise with natural and agricultural environments, ensuring the well-being of current and future generations, which has a particular focus on modernising agriculture and capacity development. 

Through STI, the SACAI will support the South African agriculture sector to adopt, scale and accelerate circular practices and technology. The SACAI will act through a hub-and-spoke model, to build and strengthen a national system of innovation, and associated capability, and will establish and strengthen strategic regional and international STI partnerships, to directly support industry and other sector stakeholders, serving as a facilitator of relevant research and related outputs.

 

UFS’ Vision 130 

“A South African Circular Agricultural Initiative perfectly aligns with our research-led, student-centred, and regionally engaged university by driving innovation and knowledge production in sustainable agriculture. This initiative will enable the university to contribute to development and social justice by advancing circular farming practices that reduce waste, optimise resources, and promote environmental sustainability, particularly in rural areas. 

“This fosters greater food security and resilience, benefiting marginalised communities, and addressing social inequalities within the agricultural sector. By involving our students, this initiative will directly support the student-centred approach, offering hands-on learning experiences that equip graduates with cutting-edge skills in circular economy principles,” says Prof Truter. 

The university’s Vision 130 focus on diversity, inclusion, and equity is reflected in the initiative’s emphasis on sharing knowledge and resources equitably, ensuring maximum societal impact and advancing a more just and sustainable agricultural system across South Africa.

Prof Vasu Reddy, UFS Deputy Vice-Chancellor: Research and Internationalisation, says: “This accolade speaks volumes of the calibre of our scholars and the recognition of our expertise in the agricultural domain. The UFS is exceptionally proud of Prof Truter’s drive, initiatives, vision and foresight. Under his leadership, we will augment and inflect even further our standing and position in the circular economy of agriculture. Reddy added: “We will not simply be the heartland but the growing soul and substance of what agriculture might become through research, implementation and impact. We are watching this space with deep curiosity.”

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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