Agriculture & Environment
Prof. John H. Muyonga Delivers Professorial Inaugural Lecture
Theme: Circular Bio-economy: Applications to the Agri-food Sector
In his Lecture, Prof. John H. Muyonga highlighted the nutritional value of waste from agri-food products and explained the measures that can be taken to minimize wastage
The Inaugural Lecture
A lot of what is thrown away as waste from agri-food products contains nutrients that are crucial for the body’s immunity. This was revealed by Prof. John H. Muyonga during his Professorial Inaugural Lecture held on 23 June 2023 at the Yusuf Lule Central Teaching Facility, Makerere University. Organized under the theme: Circular Bio-economy: Applications to the Agri-food Sector, the lecture was graced by the University Top Management led by the Vice Chancellor, Prof. Barnabas Nawangwe, and attended by academics and administrators from the 10 Colleges of Makerere, as well as the family of Prof. Muyonga. Prof. Muyonga.
The health benefits of waste from agri-food products
In his presentation, Prof. John H. Muyonga, a Professor of Food Science at the Department of Food Technology and Nutrition, College of Agricultural and Environmental Sciences (CAES), Makerere University revealed that waste of plant origin contains nutrients and a wide diversity of non-nutrient compounds (phytochemicals), that are associated with health benefits. “The non-starch polysaccharides from fruits, vegetables and whole cereals help prevent cancer, hypertensive, hypoglycemic, and hypochloresterol. Carotenoids found in coloured fruits and vegetables equally prevent hypertensive, cancer, obesity, and support vision. The phytosterols in cereals and legume cereals bran serve as antioxidants and help in the prevention of colon cancer and hypochloresterol effect, hypertensive, pytic acid, and kidney stone formation,” Prof. Muyonga explained, further highlighting valuable components of waste from selected food crops. Citrus peels and seeds contain Pectin, essences, ethanol, D-limonene, limonoids and flavonoids. Mango peels and kernels contain fibre, vitamins, carotenoids and polyphenols, kernal fat and pectin. Passion fruit seeds and rind contain pectin and linoleic acid. Banana peels have phenolics, beta-carotenoids, anthocyanins, fiber, amino acids, polyunsaturated fatty acids, vitamins, flavonoids and potassium, whereas Avocado seeds and peels contain carbohydrates, proteins, lipids, fibres, minerals, phenolics, flavonoids, and fatty acids. Prof. Muyonga also highlighted a number of valuable components in waste from animal-based foods emphasizing the need to minimize wastage. According to Prof. Muyonga, increased adoption of circular bio-economy principles can help minimise wastage. Circular bio-economy entails reuse of as much bio-waste as possible, resulting in multiple value added products from a given volume of harvested biomass. Circular bio-economy can be used to explore the use of waste streams as raw materials for products such as new food products, feed, fuel, industrial ingredients, bio-plastics, biopharmaceuticals, bio-cosmetics, enzymes, nutritional supplements, nutraceuticals, materials for tissue repair, plasma substitutes, microbes and adsorbents. Circular bio-economy decreases dependency on natural resources by encouraging sustainable goods that generate food, feed, materials and energy using biological resources.
Minimising wastage of agri-food products
During his 26 years at Makerere University, Prof. Muyonga has been key in developing research capacity on previously under researched foods including grain amaranth, jackfruit, pumpkins, Solanum anguivi (katukuma), and Nile perch, among others. Working with a number of partners, he has conducted research and come up with various technologies to minimize wastage in agri-food products. Given the Nutraceutical properties of jackfruit pulp, he has conducted research and developed protocols for drying jackfruit pulp using the Refractance Window Drying technology. He has conducted studies on pumpkin and produced shelf stable flours from seed and pulp of pumpkins. Flour from the seeds is high in phytochemicals and it is recommended for weight control. Together with his research team, they have processed sweetpotato products into shelf-stable value added products. He has also conducted research on jackfruit pectin. The work entailed extracting pectin from jackfruit and assessing its properties. He also worked on the production and utilisation of passion fruit powder. Other key activities included; Tamarind seed analysis and utilisation- Tamarind seed powder was found to be suitable for use as ingredient to enhance nutraceutical properties of juices and cookies; Nile Perch collagen and gelatin studies – Collagen has a unique amino acid profile that gives it peculiar properties, including the ability to form gels when dissolved in water; Nile Perch oil extraction and Characterisation- Fish oils are rich in omega 3 fatty acids. Omega 3 fatty acids contribute to brain development and protection against cardiovascular diseases, breast, colon and prostate cancer, inflammation, depression, pain and psychosis. He also worked on characterisation of cassava leaf, processing and utilisation. Cassava leaves were found to be high in proteins, carbohydrates, beta-carotene, polyphenols and ascorbic acid.
Future plans
In future, Prof. Muyonga intends to work on the characterization of by-products from more agri-food materials produced in Uganda. He also hopes to work on the application of novel and sustainable technologies in agri-food waste valorisation to improve extraction efficiency, efficacy and limit environmental impact; and to evaluate new applications of components of agri-food waste – e.g. in bio-based packaging and bio-preservation. Prof. Muyonga also plans to undertake policy and techno-economic analysis of valorisation options.
Remarks by the Vice Chancellor
According to Makerere University Vice Chancellor, Prof. Barnabas Nawangwe, an inaugural lecture is an occasion of significance in an academic staff member’s career at the university. It provides professors with the opportunity to share their achievements in research, innovation, engagement and teaching activities before an audience of members of the University community and the general public.
In his address, Prof. Nawangwe congratulated Prof. Muyonga for making all necessary preparations to deliver his Professorial Inaugural Lecture. “This is the way to go as we continue to boost our scholarship, image and reputation. The Professorial Inaugural Lecture should act as an inspiration to all of us as scholars to not only learn but also continuously disseminate our work. I want to implore other colleagues at the rank of Professor in the University to emulate Prof. Muyonga and also deliver their Professorial Inaugural Lectures.” The Vice Chancellor commended CAES for spearheading the initiative leading to Prof. Muyonga’s presentation and applauded the Professorial Inaugural Lectures Organising Committee (PILOC) led by Prof. David Bakibinga for a job well done in preparing for this event. Highlighting the significance of Prof. Muyonga’s lecture focus, “Circular bioeconomy: Applications to the agri-food sector”, the Vice Chancellor noted that it was quite novel and contemporary, testifying that Makerere University possesses the competencies and capacities to substantially address the national and global development challenges. “Our science, creation of new knowledge and innovations in this field will be crucial for national stability cognizant of Uganda’s rapid population growth and high levels of youth unemployment. As a premier university, we should harness the emerging opportunities including artificial intelligence which appears to be a game changer to find practical solutions to complex societal challenges at multiple scales,” he explained.
Remarks by the DVCAA
In his remarks, the First Deputy Vice Chancellor in charge of Academic Affairs, also host of the Professorial Inaugural Lectures, Prof. Umar Kakumba said Prof. Muyonga’s research works had demonstrated Makerere’s commitment and contribution to the realization of the national and global development agendas. “As academics, we have a duty to think and address the needs of the growing population, projected to reach 60 million in 2030 and 102 million in 2060. The research done by Prof. Muyonga contributes to the realization of the SDGs2,3,9,12 aimed at reducing hunger; ensuring good health and wellbeing, generating employment and income through innovation; and reversing the current consumption trends as well as promoting a more sustainable future.”
Prof. Muyonga’s biography
Prof. Muyonga holds a PhD in Food Science from the University of Pretoria, M.Sc. Food Science from Cornell University and a B.Sc. Food Science and Technology from Makerere University. He became full Professor of Food Science of Makerere University in 2010, and has served as Faculty at Makerere University since 1997. Prof. Muyonga was Head of the Department of Food Science and Technology from 2006 to 2011, during which period the Department transformed to the now School of Food Technology, Nutrition and Bioengineering and served as the pioneer Dean of the School. He has published over 80 peer reviewed journal articles, mainly in areas of nutraceutical and physico-chemical properties of traditional Ugandan foods, improvement of traditional food handling and processing methods, extrusion technology, novel drying techniques and agri-food waste valorisation. Prof. Muyonga serves as Associate Editor of two (2) international journals and his work has been cited in over 3,900 articles.
Prof. Muyonga has played critical roles in the development of capacity for food science and nutrition research and research translation in Uganda. He has led more than twenty (20) research and consultancy projects and raised over 20 million US$ for research, technology translation and institutional development. He has been key in developing research capacity on previously under researched foods including grain amaranth, jack fruit, pumpkins, Solanum anguivi (katukuma), and Nile perch, among others. As a university administrator, Prof. Muyonga coordinated the implementation of several institutional development initiatives, including a NORAD funded institutional development project for Makerere University’s Department of Food Science and Technology and the setting up of a Technology and Business Incubation Centre at Makerere University.
Under his leadership, the Department of Food Science and Technology and the School of Food Technology, Nutrition and Bioengineering initiated four (4) new degree programmes, registered great improvement in research infrastructure, greatly increased graduate students’ enrolment and graduation rates, markedly increased output of peer reviewed research articles and supported commercialisation of dozens of new food products. He has served on several boards, advisory and technical committees, and is currently Chair of the Management Committee of the National Agricultural Research Laboratories, as well as board member of Volunteer Efforts Development Concerns. Prof. Muyonga is a Fellow of the Uganda Academy of Sciences and professional member of the Institute of Food Technologists (USA). He was the 2009 TWAS young scientist, is an alumnus of the Global Young Academy, UN University and TWAS affiliate programme. He was previously member of the scientific advisory committee of the Bill and Melinda Gates funded Banana Biotechnology Programme and served as Technical Evaluator for the World Bank African Centres of Excellence for Central and Western Africa and for the European Commission research programmes. Prof. Muyonga is also a Rotarian and has served in several roles in his club (Rotary Club of Kampala North). He is a Paul Harris Fellow (PHF+3) and is actively engaged in numerous Rotary projects supporting the underserved.
Agriculture & Environment
AfPEC Project Targets to Safeguard Ecosystems in the Mt. Elgon Region through Agroforestry
*****Funded by DANIDA, Agroforestry for People, Ecosystems and Climate Change (AfPEC), a five-year project (March 2024-April 2029) focusing on Mt. Elgon Highlands in Eastern Uganda aims to foster to use agroforestry to prevent climate change and loss of biodiversity in the region. The project will focus on four districts namely: Mbale, Bududa, Bulambuli, and Kapchorwa. Project Partners: Makerere University, Aarhus University & University of Copenhagen (Denmark), Youth Leading Environmental Change (YLEC), Seniors without Borders, Forests of the World, Stjernekommunikation, and FrellsenKaffe. Through the project, coffee farmers in the region will be supported to export their coffee to Denmark. The project team held the inception meeting on 25th-26th September 2024 in Mbale City.
Overview
Climate change and biodiversity loss are emerging as two of the greatest environmental challenges facing humanity. In Uganda, natural ecosystems such as forests and wetlands contribute considerably to people’s livelihoods and the national economy. However, rapid population growth has led to the degradation of these ecosystems due to increased demand for firewood and the conversion of land for agricultural purposes. Furthermore, the effects of climate change, including variable rainfall patterns and higher temperatures, are leading to a rise in the frequency and intensity of floods, droughts, landslides, windstorms and hailstorms (UNEP- Ecosystem-Based Adaptation in Uganda). Failure to tackle the effects of climate change threatens the achievement of the Sustainable Development Goals (SDGs), with catastrophic consequences that will hit the poorest and most vulnerable communities first and hardest (UCL Global Governance Institute, 2021). The United Nations Decade on Ecosystem Restoration 2021-2030 is a rallying call for the protection and revival of ecosystems around the world, for the benefit of people and nature. It aims to halt the degradation of ecosystems, and restore them to achieve global goals.
Agroforestry as a climate change adaptation strategy
Agroforestry, the purposeful integration of trees or shrubs with crops and/or livestock at the plot, farm, and/or landscape scale, is one potential climate change adaptation strategy to increase the resilience of farmers and agricultural systems against climate risk, providing a range of biophysical and socioeconomic benefits. As highlighted by the Intergovernmental Panel on Climate Change (IPCC) reports of 2022, agroforestry is a promising agro-ecological approach to climate change adaptation because of the multitude of co-benefits that many agroforestry systems provide including, enhanced food security and income opportunities, the provisioning of ecosystem services, and biodiversity conservation (Amy Quandt, et.al 2023). Agroforestry significantly impacts the environment in diverse ways that contribute to both global environmental goals and local sustainability. Despite of the benefits, promotion, implementation and sustainability of agroforestry practices is still not well addressed.
Purpose of the AfPEC project
Coffee farmers in the Mt. Elgon Region in Eastern Uganda have traditionally with success used agroforestry that protects important water catchments and biodiversity hotspots, but these areas now experience degrading soils caused by external factors such as forest loss, soil erosion and population growth. Changes in climate have also affected farming conditions favouring more drought-resistant crops and agroforestry systems with well-developed shade. Agroforestry for People, Ecosystems and Climate Change (AfPEC), a new project funded by DANIDA aims to understand the factors that motivate coffee farmers to engage in agroforestry, and to foster the use of agroforestry to minimize the effects climate change and loss of biodiversity in the region. Specifically, the project aims to document the effects of agroforestry in terms of ecosystem services and livelihood benefits, to understand motivating factors for long-term sustainable development, and to support science-based agroforestry in practice. The project will focus on four districts namely: Mbale, Bududa, Bulambuli and Kapchorwa.
Specific objectives
The project will be implemented though five work packages in line with the objectives below;
1.Quantifying the potential of agroforestry in terms of ecosystem services – Under this objective the focus is to assess the benefits of various agroforestry systems, including carbon sequestration, biodiversity conservation, and other ecosystem services. This research will help stakeholders understand the potential and limitations of different agroforestry approaches and contribute to mitigating climate change and biodiversity loss. Additionally, the findings will be used to select suitable native tree species for planting in highland coffee agroforestry systems.
2.Identifying livelihood benefits from agroforestry and key factors for long-term sustainable development.
3.Channelling scientific knowledge on agroforestry into practice –Given the urgent threats posed by biodiversity loss and climate change in Africa, it is imperative to translate scientific research into practical solutions. In collaboration with NGOs and local farming communities, the project team will disseminate user-friendly information and ensure that research findings directly benefit livelihoods and ecosystems. The goal is to increase local income through sustainable coffee production, carbon credits, and potentially, emerging markets for ecosystem services.
4. Building multidisciplinary capacity at university level –The project will train four PhD students from Uganda, and at least 12 master students from Denmark.
5. Promoting optimized agroforestry systems widely.
Partner Institutions
AfPEC is composed of seven partners: three university partners with multidisciplinary backgrounds, three Danish and Ugandan NGOs and a private communication company. All partners work in close collaboration with four coffee farmer communities. These include; Makerere University, Aarhus University (Department of Ecoscience), University of Copenhagen, Youth Leading Environmental Change (YLEC), Seniors without Borders, Forests of the World, Stjernekommunikation, and FrellsenKaffe.
Project team
The overall PI is Dr Anne Mette Lykke from Aarhus University. At Makerere, the project is coordinated by Prof. John Tabuti from the Department of Environmental Management and Prof. Frank Mugagga from the Department of Geography, Geo-Informatics and Climatic Sciences. Other participants: Aarhus University, Department of Ecoscience (Jørgen Axelsen), Makerere University (Dr Josephine Esaete and Dr Kellen Aganyira), University of Copenhagen (Ida Theilade, Nerea Turreira Garcia, Stine Kroijer), Seniors without Borders (Poul Kroijer, Lone Jacobsen, Kjeld Lanng, Frans Theilby, Lars Brodersen, Jan Thorn Clausen, Hazra Okem, Ann Grace Apiita, Emmanuel Alituha, Christopher Ejiku), Youth Leading Environmental Change (Daniel Esayu, Annet Nakkazi, Richard Tusabe), Forests of the World (Jens Holm Kanstrup, Kristian Lybæk, Abiyu Lencho), and Stjernekommunikation (Jan Stjerne).
AfPEC Inception meeting in Mbale City
On 25th-26th September 2024, the project team held an inception meeting in Mbale City to get stakeholder buy-in and concretize roles of team members. The meeting was attended by 52 participants including the project team, farmers from participating districts, RDCs from participating districts, representatives from the participating NGOs – Seniors without Borders, Youth Environmentalists leading Environmental Change (YLEC) and Forests of the World, and Graduate students attached to the project.
Presentations/remarks by the project team
In his welcome address, Prof. Frank Mugagga, one of the project coordinators at Makerere University appreciated participants for honouring and turning up for the workshop, noting that it was important for the team to establish a working relationship for smooth implementation of the project. Outlining the importance of research and partnerships towards the vision and mission of Makerere University, he expressed gratitude to the funders, and the Project PI, Dr Anne Mette Lykke for her unwavering efforts towards securing the grant.
Presenting an overview of the project, the lead Coordinator in Uganda, Prof. John Tabuti explained that although agroforestry systems have been around for long, their contribution has not been well understood and adopted. Discussing the different work packages, Prof. Tabuti said the project would document both negative and positive impacts of highland agro-ecosystems to improve their contribution to ecosystems and livelihoods.
At the meeting, the Project PI, Dr Anne Mette Lykke briefed participants on ethics and the rules governing the DANIDA AfPEC Grant. She presented the partnership grant agreement, highlighting the research ethics considerations, rules on publications, communication and dissemination requirements, and data sharing and management as guided by DFC. She urged the project team to familiarise themselves with the regulations to ensure timely delivery of the intended outputs.
In his remarks, the representative of farmer groups in Mbale District, also Chairperson of Bufumbo Agroforestry Group, Mr. Hussein Mafabi appreciated the project team and funders, noting that the initiative would greatly improve their skills in agroforestry. Highlighting the factors fuelling environmental degradation in the region, Mr. Mafabi decried the lack of a clear policy on plastic waste management, calling for support to avert the crisis. He emphasized the need to translate the project results into actual policy changes to further collaboration beyond AfPEC. “AfPEC has the support of local communities who are eager and willing to participate in the project activities,” he noted.
During the workshop, representatives from the partnering NGOs including Seniors without Borders, Forests of the World, and YLEC shared their experiences working in the region, outlining success stories in coffee agroforestry that the AfPEC project can leverage to achieve its targets. Prof. Jørgen Axelsen briefed participants on the biological pest control processes, whereas Dr James Johns from Forests of the World delivered a presentation on biomass and carbon sequestration in Uganda’s smallholder agroforestry systems. Speaking to participants, Dr Poul Kroijer (Seniors without Borders) noted that through the AfPEC project, farmers in the region will be able to export their coffee to Denmark. The team expressed willingness to support the project activities.
Presentations by MSc and PhD students supported by the Project
AfPEC project will train four PhD students from Uganda, and at least 12 master students from Denmark.
During the workshop, three Masters Students from Aarhus University, Denmark and four PhD students from Makerere University who will be conducting research on different aspects of agroforestry in the Mt. Elgon Region, Eastern Uganda presented their research ideas to participants who provided enriching feedback. These are; Smilie Nielsen (MSc Human Security) who will be examining the factors that motivate young coffee farmers in Mt. Elgon Region to engage in agroforestry, Ms. Josephine Fogt Anderson (MSc Human Security) who will be studying women-nature relations in agroforestry and planting initiatives (How gender equality can be addressed in tree planting and agroforestry projects), and Ms. Matilda Willemoes who will be exploring the potential for carbon sequestration and storage in coffee Forestry systems.
The PhD students include Mr. Patrick Kayima who will study value chain and livelihood benefits of coffee agroforestry, and Ms. Patricia Adoch who will evaluate the influence of different management practices of coffee agroforestry systems on pollinators and pests in the Mt. Elgon Region. Ms. Joyce Lunyolo will conduct research on incentives for stewardship efforts in coffee agroforestry among farmers in the region, whereas Mr. Derick Kisegu will study and document the contribution of Arabica coffee agroforestry systems in mitigation and adaptation to climate change in fragile highland ecosystems of Uganda.
The students will be supervised by academics from the partner institutions namely: Prof Anne Mette Lykke, Prof. John Tabuti, Prof. Frank Mugagga, Dr. Josephine Esaete, Prof. Ida Theilade, Dr. Kellen Aganyira, Prof. Stine Kroijer, and Prof. Katrine GroFriborg.
Remarks by the Chief Guest
Addressing participants, the Deputy RDC Kapchorwa District, Mr. Martin Sakajja, on behalf of the Resident District Commissioners (RDCs) in the project area, expressed gratitude for the initiative noting that it holds immense significance for the country and world at large. “Agroforestry represents the fusion of agricultural productivity with ecological conservation—a synergy that is critical for sustainable development in our times. For generations, rural populations have depended on agriculture as their primary source of livelihood. Yet, we know the challenges farmers face: declining soil fertility, erratic rainfall, and dwindling forest resources. Agroforestry addresses these issues by promoting sustainable agricultural practices that not only enhance food security but also generate additional sources of income from forest products such as fruits, timber, and medicinal plants. Through this project, we envision empowering farmers to increase their yields while preserving the natural resources they rely on. By embracing agroforestry, we are not only reducing our vulnerability to climate change but also contributing to global climate goals. I commend Makerere University and all the partners involved in this project for their vision and dedication,” he noted.
Remarks by the representative of Makerere University
On behalf of Makerere University, Dr Henry Ssemakula appreciated the project team for the initiative noting that it aligns with the sustainable development goals (SDGs), the National Development Plan, and the Parish Development Model. “The project is also in tandem with our strategy of transforming Makerere into a research-led University responding to national, regional, and global development challenges, and contributing to global knowledge generation. Its commitment to capacity building through Masters and PhD trainings, community engagement, and internationalization is equally commendable.” He appreciated the funders for supporting AfPEC and several other projects in Uganda.
The workshop was moderated by Dr Josephine Esaete, Dr Vincent Muwanika, and Dr Kellen Aganyira from Makerere University.
On the final day of the workshop, the project team conducted a reconnaissance tour of three research sites namely; Bufumbo in Mbale, Buginyanya in Bulambuli District, and Sipi in Kapchorwa District.
More photos from the workshop
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