GYPREG: Gypsum potential in Sweden and field test preparations

The main purpose of the GYPREG project is to increase the uptake of gypsum treatment in agricultural fields and promote the adoption of good practices to reduce phosphorus losses into the Baltic Sea. Together with Swedish University of Agricultural Sciences (SLU), RFTB performed a GIS-analysis (Geographic Information System) of agricultural areas in Sweden draining to the Baltic Sea and suitable for gypsum amendment. The study showed that there are 229 645 hectares of suitable land in Sweden draining to the Baltic Sea, where gypsum treatment can be applied. 

The GIS analysis has been an important activity of the project as it determines the potential impact gypsum treatment can have in Sweden. Certain critera has been used (based on previous GIS-analysis performed in Finland) as not all land is suitable – parameters like soil type, vicinity to lakes, groundwater areas and NATURA2000 areas and acidity (pH) are examples of important factors to understand. The study showed that there are 229 645 hectares of suitable land in Sweden draining to the Baltic Sea, where gypsum treatment can be applied. Most areas where the treatment is applicable were found in southern Sweden.  

A similar initial GIS analysis has been carried out by GYPREG project partner in Poland, Institute of Technology and Life Sciences – National Research Institute. Indicating considerable potential. This is also an important assessment for RFTB as increased focus and engagement is planned in Poland as the GYPREG-project develops.  

With background of the assessments done, RFTB has started defining pilot fields in Sweden and preparing field pilots, which are planned for August 2024. This involves selecting areas, agreements with land owners and practical implementation of gypsum application.  

Together with Swedish project partner RISE Research Institutes of Sweden, several interactive communication activities are being planned, in order to engage key stakeholders which will be important for promoting gypsum treatments in the future. The first GYPREG webinar was held on April 10th, where identified Swedish stakeholders invited. 

Agricultural field treated with gypsum. © Ikka Vuorinen, John Nurminen Foundation