New agricultural soil model developed
Current models of soil function under agriculture focus on either small-scale (individual plots) or large-scale (national or continental) dynamics. Due to the variable topography found in Europe, there is a need for an intermediate-scale model of soil changes. The EU-funded GAEMASS project aimed to improve our understanding of agricultural soil resources and how they are affected by changes in environment and climate. Project scientists set out to develop and validate a geomorphic and agro-ecosystem model that focuses on the intermediate scale. They linked geomorphic and soil erosion models to existing local-scale agro-ecosystem models to produce a coupled model that focuses on processes. The model was validated against data from three European agricultural regions. The GAEMASS model was also compared to previously developed soil ecosystem models, which demonstrated that the model offered better data on erosion and water supply issues. In addition, the model showed that soil redistribution had a major effect on crop productivity. Project outcomes will lead to a better understanding of how erosion, climate change and agricultural activities will impact soil quality. This is ultimately important for ensuring maximal crop productivity.
