Co-funded by South Africa's National Research Foundation (NRF) and the Indian Department of Science and Technology, Prof Kutu's multi-year research project explores how fertilisation methods – both organic and inorganic – influence the uptake of essential micronutrients in tea crops.
"This multi-year research project on tea fertilisation and micronutrient uptake represents a meaningful collaboration between South Africa and India and stands as a testament to the impact of cross-border scientific partnerships," he said.
Prof Kutu's work forms part of a broader commitment to addressing global challenges such as declining soil fertility, food insecurity, and micronutrient deficiencies. His research investigates the relationship between soil management practices and the accumulation of key micronutrients – iron (Fe), zinc (Zn), and copper (Cu) – in both tea leaves and the infusions made from them.
"A key component of the study was a comparative analysis between South African and Indian tea cultivars," he explained. "The findings reveal that both Thohoyandou-grown tea and Assam-grown tea are rich sources of these nutrients, which play vital roles in human growth, immune function, and overall well-being."
The study also examined the bioavailability of these nutrients – how much becomes accessible to the human body when the tea is consumed. "The results suggest that tea could potentially serve as a natural dietary supplement, contributing to the daily micronutrient intake of individuals, including children, the elderly, and women of childbearing age," he said.
In highlighting the influence of fertilisation on nutritional quality, Prof Kutu noted that organic practices such as the use of composted materials do more than improve yield – they also enhance the nutritional profile of crops.
Building on his earlier NRF-funded Phospho-Compost Technology Project, he explored the integration of waste recycling, soil health, and plant nutrition – principles that form the foundation of sustainable agriculture.
His collaboration with Professor Tanmoy Kanti from the Tea Research Association of India has yielded several peer-reviewed publications that are gaining traction in international scientific circles.
The project aligns with global efforts to combat "hidden hunger" – a form of malnutrition caused by a lack of essential vitamins and minerals – and offers practical, evidence-based strategies for improving both health and agricultural outcomes.
"For farmers, the study shows how adopting improved fertilisation methods can yield crops with higher economic and nutritional value," said Prof Kutu. "For policymakers and nutritionists, it presents tea as a vehicle for delivering essential nutrients in a culturally acceptable and accessible manner."
As the University of Mpumalanga strengthens its reputation as a hub for impactful, solution-oriented research, Prof Kutu's work exemplifies the institution's mission to generate knowledge that promotes sustainability, innovation, and the public good.
In an era where food security and nutrition are increasingly urgent global concerns, this groundbreaking research highlights the potential of everyday crops – and reminds us that sometimes, transformative solutions can be found in something as familiar as a cup of tea.
The story is based on the NRF Science Matters podcast. To watch the full interview, follow this link: https://www.youtube.com/watch?v=-pP3cZNlG9A
Story by. Pictures supplied.