Part 1 – Professor Paul Hallett: Leading the Society & Evolving the Discipline The episode opens with an in‑depth interview with Professor Paul Hallett, President of the British Society of Soil Science and Professor of Soil Physics at the University of Aberdeen. Paul reflects on his unexpected route into soil science, shaped by environmental awareness, academic mentors, and early hands‑on fieldwork. He discusses: his career in soil physics and biophysics, including research on root–soil interactions, slope stabilisation, soil degradation, and international development; the balance between research, teaching, and supervising more than 120 PhD students; highlights from his presidency so far — record membership growth, winning the EuroSoil 2028 bid for Edinburgh, strengthening member engagement, and expanding policy and education initiatives; major challenges facing soil science, including declining university funding, low student numbers, and rising industry demand; his hopes for the remainder of his presidency, including the forthcoming State of Soil Science Report, deeper education collaboration, and greater international reach; and his extensive research links in Ethiopia and China, including work on soil degradation, land regeneration, and major bilateral Critical Zone Observatory collaborations. Paul also shares his thoughts on how soil science teaching must evolve over the next decade to remain relevant, inclusive, and aligned with real‑world needs. Part 2 – Adam Burton: A Student’s Perspective from Zambia to Aberdeen (33:47) Next, Paul Lincoln welcomes Adam Burton, a third‑year Plant and Soil Science student at the University of Aberdeen and one of Paul Hallett’s undergraduates. Adam discusses: growing up on his family’s third‑generation farm in Zambia and witnessing the limitations of synthetic, input‑heavy farming; how these experiences inspired him to pursue soil science in the UK; how his degree has transformed his understanding of soil processes, sustainability, and plant‑soil interactions; his evolving career interests — from regenerative agronomy to consultancy, carbon sequestration, and global food systems; the changing public and agricultural appreciation of soil health, particularly across Africa, Europe, and the UK; and what better soil communication could mean for the next generation of farmers, scientists, and decision‑makers. His reflections offer an inspiring student‑level view of the challenges and opportunities ahead for soil science. Part 3 – Professor Yong‑guan Zhu: Soil Science in China & Global Collaboration (50:22) The third guest is Professor Yong‑guan Zhu, Director General of the Institute of Urban Environment at the Chinese Academy of Sciences and one of China’s most influential soil scientists. Professor Zhu discusses: the transformation of soil science in China over the past 30 years, including rapid internationalisation and major national investment; the central role of soil science in China’s food security, environmental quality, and sustainable development goals; career pathways for soil scientists within and beyond academia in China; his leadership in the China‑UK Critical Zone Observatory programme, bringing together atmospheric, hydrological, ecological, and soil systems research; the importance of peri‑urban soil systems in recycling nutrients, protecting biodiversity, and supporting growing cities; and China’s pioneering work on nutrient recycling, especially phosphorus. He also previews the World Congress of Soil Science in Nanjing, where he will deliver a keynote lecture, and reflects on the value of long‑term scientific friendships and collaborations. Part 4 – Professor Xin Song: Emerging Contaminants & the World Congress of Soil Science (1:09:16) The episode closes with Professor Xin Song from the Institute of Soil Science, Nanjing — a key organiser of the 2026 World Congress and an expert on soil contaminants, including PFAS (“forever chemicals”). Xin explains: the global significance of this year’s Congress and its theme: “Soils and a Shared Future for Humanity”; the major themes for 2026: soil health, climate adaptation, soil carbon, digital soil science, biodiversity, remediation, and sustainable land management; why international collaboration is vital for understanding and regulating PFAS, microplastics, and other emerging contaminants; her research on PFAS transport through soils, uptake into crops such as rice, and impacts on groundwater and human health; innovative remediation strategies such as in‑situ treatment, bioremediation, advanced materials, and life‑cycle‑based design; and the growing prospects for students and early‑career researchers, including AI, remote sensing, carbon markets, consultancy, and policy pathways. She also discusses major shifts in the profession — digital transformation, global equity, and stronger integration between science, policy, and practice — and confirms that hybrid online access is planned for the Congress. Closing Together, these four interviews paint a vivid picture of a discipline undergoing rapid change — scientifically, professionally, and globally. From the presidency of the BSSS to student experiences and major international collaborations, Episode 8 shows that soil science is more essential than ever in meeting global environmental, agricultural, and societal challenges. For more information, visit: soils.org.uk/soilmatters
