Fig. 4From: What are the effects of agricultural management on soil organic carbon in boreo-temperate systems?Screenshot of the systematic map geographical information system (GIS). Figure demonstrates interrogation of the ‘Crop rotation’ layer for a study in Ireland (Clifton-Brown et al. 2007) and showing the filtered systematic map database presented below the map. Also shown in this screenshot is the Köppen-Geiger Climate ClassificationBack to article page