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. 2017 Jul 25;4:170092. doi: 10.1038/sdata.2017.92

Figure 1. Locations of soil sampling and descriptions of data collection conducted for this study.

Figure 1

The locations and names of eighteen North American sampling sites are shown grouped into six ecozones. The term ‘ecozone’ is used to refer to the distinct local assemblages of organisms and climatic factors between groupings of sites. An overview of the design for soil sampling along with data collection are superimposed on the map. OM removal treatments are shaded according to the intensity of OM removal.