Figure 4
From: Cropping System Conversion led to Organic Carbon Change in China’s Mollisols Regions
The locations of sampling sites in Heilongjiang Province, China. Blue circles indicate corn monocropping during 2005–2014 (C-C), yellow circles indicate soybean monocropping during 2005–2014 (S-S), pink circles indicate break crop during 2005–2014 (S-C). Samples for C-C, S-S and S-C were 20, 5 and 55 respectively. The map created by the ArcGIS 10.2 software package. http://www.esri.com/software/arcgis.
