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12 November 2025 | Story Vuyelwa Nkoi | Photo Supplied
SDG Challenge
Interdisciplinary innovators from the Faculty of Natural and Agricultural Sciences – Njabulo Dlamini, Vuyelwa Nkoi, Hanipher Mili, Gugulethu Nhlapho, and Almaré de Bruin – winners of the 2025 SDG Challenge South Africa.

A dynamic team of students from the University of the Free State (UFS) has secured first place in the 2025 SDG Challenge South Africa – a prestigious competition that unites students and industry partners in addressing real-world issues aligned with the United Nations Sustainable Development Goals (UNSDGs). This outstanding achievement celebrates the creativity, collaboration, and strong commitment of UFS students to building a more sustainable and inclusive future.

Hosted by Soapbox South Africa, the SDG Challenge pairs student teams with industry experts to co-design practical solutions to pressing societal needs. Competing against leading institutions – including the University of Pretoria, University of Zululand, University of Johannesburg, the University of the Witwatersrand, and the University of KwaZulu-Natal – the UFS students distinguished themselves with a community-driven, scalable approach.

The winning UFS team consisted of Almaré de Bruin, Njabulo Dlamini, and Vuyelwa Nkoi from the Department of Sustainable Food Systems and Development, as well as Hanipher Mili and Gugulethu Nhlapho from the Department of Agricultural Economics – reflecting a powerful interdisciplinary collaboration.

 

Innovative Agrihub solution for community sustainability

Partnering with Ivanplats mine, the students developed a holistic solution to reduce food insecurity and promote environmental sustainability in resource-limited communities in Mokopane.

Their innovative project, built around a WhatsApp-based Agrihub, enables agricultural knowledge sharing, market access, and community engagement. The solution included the following:

  • A WhatsApp Agrihub platform for real-time agricultural support
  • An Implementation Manual for community rollout
  • A low-cost irrigation prototype designed for small-scale gardens
  • A scalable model for replication in other communities
  • A final showcase presentation demonstrating its feasibility and long-term impact

To reduce surplus produce waste and create entrepreneurial opportunities, the team also produced value-added products – including pickled beetroot and carrot preserves – in the UFS food lab.

The Agrihub doubles as a community marketplace where residents can sell both fresh produce and recyclables. A R20 subscription fee supports local facilitators and content creators, promoting sustainability and community ownership.

Their project advances multiple UNSDGs, notably Zero Hunger, Responsible Consumption and Production, Climate Action, and Decent Work and Economic Growth.

“This victory is a testament to the calibre of our students and the mentorship they receive,” says Prof JW Swanepoel from the Department of Sustainable Food Systems and Development. “Their innovative thinking and commitment to real-world impact reflect the values of the University of the Free State.”

The UFS team’s success not only underscores their potential as emerging leaders in sustainability, but it also affirms the university’s growing role in driving development and resilience across African communities.

News Archive

Sunflowers are satellite dishes for sunshine, or are they?
2016-07-20

Eighty-six percent of South Africa’s
sunflowers are produced in the
Free State and North West provinces.

Helen Mirren, the English actress, said “the sunflower is like a satellite dish for sunshine”. However, researchers at the University of the Free State (UFS) have found that too much of this sunshine could have a negative effect on the growth of sunflowers, which are a major source of oil in South Africa.

According to Dr Gert Ceronio from the Department of Soil, Crop, and Climate Sciences at the UFS, extremely high soil temperatures play a definite role in the sprouting of sunflower seedlings. Together with Lize Henning, professional officer in the department, and Dr André Nel from the Agricultural Research Council, he is doing research on biotic and abiotic factors that could have an impact on sunflowers.

Description: Sonneblom 2 Tags: Sonneblom 2

Various degrees of deformity (bad-left
to none-right) in seedlings of the same
cultivar at very high soil temperatures.
Photo: Dr Gert Ceronio

Impact of high temperatures on sunflower production

The Free State and North West provinces, which produce 86% of South Africa’s sunflowers, are afflicted especially by high summer temperatures that lead to extremely high soil temperatures.

Dr Ceronio says: “Although sunflower seeds are able to germinate at temperatures from as low as 4°C to as high as 41°C, soil temperatures of 35°C and higher could have a negative effect on the vegetative faculty of sunflower seedlings, and could have an adverse effect on the percentage of sunflowers that germinate. From the end of November until mid-January, this is a common phenomenon in the sandy soil of the Free State and North West provinces. Soil temperatures can easily exceed the critical temperature of 43°C, which can lead to poor germination and even the replanting of sunflowers.”

Since temperature have a huge impact not only on the germination of sunflower seeds, but also on the vegetative faculty and sprouting of sunflower seedlings, Dr Ceronio suggests that sunflowers should be planted in soil with soil temperatures of 22 to 30°C. Planting is usually done in October and early November. Unfortunately, this is not always possible, as soil moisture is not optimal for growth. Farmers are then compelled to plant sunflowers later.

Impact of herbicides on sunflower growth

“High soil temperatures, combined with the herbicide sensitivity of some cultivars, could lead to the poor development of seedlings," says Dr Ceronio.

The use of herbicides, such as ALACHLOR, for the control of weeds in sunflowers is common practice in sunflower production. It has already been determined that ALACHLOR could still have a damaging effect on the seedlings of some cultivars during germination and sprouting, even at recommended application dosages.

“The purpose of the continued research is to establish the sensitivity of sunflower cultivars to ALACHLOR when exposed to high soil temperatures,” says Dr Ceronio.

 

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