DSMS is an open geodatabase with information on the topsoil of the arable land in Sweden. The aim is that the data shall be accurate and detailed enough to be useful for precision agriculture, i.e. for management decision within fields.
The spatial resolution of DSMS map layers is 50 m × 50 m. Currently, it covers > 90% of the arable land of Sweden (~2.5 million ha). Non-agriculture land and areas with organic soil are not covered. Access to a number of national datasets made it possible to build the DSMS. Results from two soil sampling campaigns (~15 000 samples) were combined with remote sensing data (gamma radiation data from airborne radiometric scanning and a digital elevation model derived from airborne laser scanning) plus a Quaternary soil deposit map. So far, multivariate adaptive regression splines models were parameterized for content of clay, sand and organic matter, as well as buffering capacity and target-pH. DSMS data is provided for free by the Geological Survey of Sweden (SGU). Examples of applications developed based on the DSMS are web applications used by farmers to generate prescription files for variable-rate seeding and variable-rate liming – e.g. Markdata.se.
Later research has focused on developing interactive functionality between digital soil mapping databases and the user’s local data. This means that a user can combine local data with e.g. DSMS maps, and automatically downscale the database to generate improved local maps.
Currently, research is ongoing for developing new map layers of DSMS.
DSMS is free to use and can be used for the development of web applications suitable for precision agriculture. The image shows a map for variable-rate liming developed in Markdata.se, an application based on DSMS data.
DSMS development project team: Mats Söderström and Kristin Piikki, SLU; Gustav Sohlenius and Lars Rodhe, SGU. Development of Markdata.se was carried out by Kristin Piikki and Mats Söderström, SLU; Henrik Stadig, Hushållningssällskapet; Johan Martinsson, DataVäxt AB. Current research is carried out by PhD student Karl Adler, SLU.
Projects and Funding
A pre-study was carried out by SLU in collaboration with Hushållningssällskapet in 2010-2011 (Swedish National Space Board, proj no. 199/10). The initial development of DSMS started in 2013 was also financed by the Swedish National Space Board (proj no. 214/13) and SGU. Further developments have been funded by the Swedish Foundation for Agricultural Research (SLF; O-15-20-566). Current projects for the development of DSMS are funded by Västra Götalands Regionen and SLU (VGR/SLU project RUN 2018-00141).
DSMS could be created thanks to availability of data från Lantmäteriet, SGU, the Swedish Board of Agriculture (Jordbruksverket) and Swedish Environmental Protection Agency (Naturvårdsverket).
Peer-reviewed journal articles
- Piikki, K., Söderström, M. 2017. Digital soil mapping of arable land in Sweden – Validation of performance at multiple scales. Geoderma, in press. DOI: 10.1016/j.geoderma.2017.10.049.
- Söderström, M., Sohlenius, G., Rodhe, L., Piikki, K. 2016. Adaptation of regional digital soil mapping for precision agriculture. Precision Agriculture, 17, 588-607.
Conference papers, book chapters
- Piikki, K., Söderström, M., Stadig, H. 2017. Local adaptation of a national digital soil map for use in precision agriculture. Advances in Animal Biosciences: Precision Agriculture (ECPA) 2017, 8:2, 430-432.
- Piikki, K., Söderström, M. 2016. The new digital soil map of Sweden – for free use in precision agriculture: 13th International Conference on Precision Agriculture, St Louis, MI, USA.
- Söderström, M., Piikki, P. 2016. Digitala åkermarkskartan – detaljerad kartering av textur i åkermarkens matjord. POS Teknisk rapport 37, Institutionen för mark och miljö, Sveriges lantbruksuniversitet. (In Swedish).
- Söderström, M. 2013. Digital markkartering av Skånes åkermark. POS Teknisk rapport 26, Institutionen för mark och miljö, Sveriges lantbruksuniversitet. (In Swedish).
Web pages, applications