Vol. 11, Issue 3 (2022)

Author(s):
Ku Reena, Dashrath Singh, SG Rajput, Alok Kumar and PK Rajput

Abstract:
A systematic set of geo-referenced 670 soil samples was collected from Dhamtari district, soils comes under Alfisols order covering 119630 ha i.e. 29.18% entire area using GPS (Global positioning system) and the maps showing the spatial variability of individual micronutrient cation (Zn, Cu, Mn and Fe) were generated using Arc Info GIS (Geographic information system). The multi-micronutrient status map was also generated by integrating the individual micronutrient map in GIS. The descriptive statistics on soil characteristics indicated that the pH of the soils varied from 4.8 to 7.9 (mean = 6.3). The electrical conductivity (EC) ranged from 0.02 to 0.91 dS m^-1 (mean = 0.20 dS m^-1). The organic carbon (OC) ranged from 0.07 to 1.25% (mean = 0.56%). The DTPA-Fe, Mn, Zn and Cu ranged from 7.40 to 93.50, 0.24 to 66.50, 0.11 to 3.88 and 0.21 to 6.00 mg kg^-1_, respectively, while the mean 40.92, 22.72, 0.80 and 2.50 mg kg^-1. Organic carbon, EC and pH were the important factors in controlling the micronutrient availability. The GIS-aided thematic maps indicate the toxicity of Fe, Mn and Cu were 93.70%, 40.39% and 73.02% respectively, while the 40% deficiency of Zn under was found. The soil of Dhamtari district under Alfisol soil was observe a severe toxicity of cationic micro nutrient except Zn, the Zn deficiency due to rise based cropping system.