Climate-Smart Agriculture on Organic Soils (CAOS) This proposal aims to test and quantify at field to farm scale in regions with a large share of organic soils in five EU member states (DE, EE, FI, NE, SWE) based on on-farm historical evidence and manipulation experiments, how water management on semi-wet organic soils can buffer future climate risks for biomass production while maintaining soil quality. Typical farming systems are chosen for each test region Keywords: climate smart agriculture, peat soils, grassland, GHG emissions, subsidence, soil degradation Projectopdracht wordt uitgevoerd volgens het werkplan van CAOS, zoals dit is goedgekeurd door de management board van JPI FACCE

The project is part of the FACCE-ERA-NET+ action on Climate Smart Agriculture: Adaptation of agricultural systems in Europe and co-funded by the participating member states: Germany (coordinator), The Netherlands, Denmark, Sweden, Finland and Estonia.

Peatlands store a major share of the worlds soil organic carbon and are widespread in Northern and Central European countries. 80 % of Europes peat soils have been cultivated for agricultural use in the past centuries. Drainage is a precondition for classical agricultural production on organic soils, but fosters soil degradation, land surface subsidence and peat mineralization. Therefore, managed organic soils are the largest sources of greenhouse gas (GHG) emissions (e. g. CO2, CH4 and N2O) from agriculture and other land use sectors in peat-rich countries of Northern, Central and East Europe. At the same time, managed organic soils offer a high adaptation potential to avoid yield losses and land abandonment while reducing greenhouse gas and nutrient emissions.

The CAOS project aims to generate the knowledge to design climate smart agricultural systems for organic soils adapted to the diverse regional conditions of Northern and Central Europe. CAOS will provide and distribute evidence that active management aiming at a better control of groundwater levels, improved trafficability and alternative high productivity crops improves yield stability and quality as well as resilience to climate change while providing strong GHG mitigation and improved soil and water quality.