On 10 December 2025, the Carbon 4 Soil Quality (C4SQ) project held its final international hybrid conference in Thessaloniki and online, bringing together researchers, policymakers, advisers, and practitioners from across Europe.

The conference addressed the urgent challenge of declining soil organic carbon (SOC) in Southern and Eastern Europe and highlighted the need for a transition to sustainable soil management and carbon farming. In his keynote speech, Prof. Thomas Kätterer (Swedish University of Agricultural Sciences) emphasized that while carbon sequestration is technically feasible, most European croplands are still focused on slowing carbon loss rather than achieving net carbon gains.

The event also showcased the project’s main outcome – the Carbon Farming Toolbox, providing SOC reference values, carbon farming practice guidelines, cooperation models, and policy recommendations for carbon credit schemes.

The conference featured one opening keynote and three focused sessions, each showcasing a range of expert presentations. Below, you will find an overview of each session with presentation titles, speakers, and downloadable slides where available.