Geo Spatial Assessment and Micronutrient Mapping of Calcareous Soils in Muzaffarpur District, Bihar, India

The soil fertility maps created using GIS are valuable tools, with the geo-coordinates of soil samples recorded using a Garmin GPS device and then imported into the base map through ArcGIS software. The analyzed soil fertility data covers sampling sites in the Minapur, Kanti, and Marwan blocks of Muzaffarpur district, Bihar. A total of 40 geo-referenced composite soil samples were collected from various locations, with multiple soil fertility parameters assessed using standard prescribed methods. The results indicated that the soil had an alkaline reaction, with a pH value above 7.5. The soil organic content ranged from low to medium. DTPA-extractable available zinc (Zn) levels varied between 0.14 and 0.79 ppm, with an average of 0.42 ppm. Copper (Cu) levels were below the critical limits, while iron (Fe) and manganese (Mn) were found in relatively medium concentrations.