A raw data article on the physico-chemical properties of soil from six firkas in Dharmapuri district, Tamil Nadu, India

The present study was aimed to assess the physical and chemical characteristics of soil belonging to six firkas covering three blocks of Dharmapuri district. A total of 125 samples were collected by means of Global Positioning System (GPS). The processed soil samples were analyzed for pH, Electrical conductivity (EC), soil separates, Bulk density (BD), Water holding capacity (WHC), organic carbon (OC), calcium carbonate (CaCO(3)), available nitrogen (AVN), available phosphorus (AVP), and available potassium (AVK). Extreme value in the data set was removed by outlier removal algorithm. Spatial variability maps were prepared using the kriging method using ArcGIS 10.4 . The best fitted semi variance model for pH, EC, AVK and CaCO(3) was spherical; BD, sand, silt, and OC was circular; a Gaussian model was best fitted for WHC and AVN, while clay and AVP were exponential. The data presented in this study will help farmers, land managers, and policymakers to mitigate land degradation, and other environmental issues, thereby helping to increase land productivity.