GIS Based Spatial Variability of Available Micro Nutrients in Soil of District Indore, Madhya Pradesh, India

Abstract

The investigation was conducted in 2020-21 at Indore, District Madhya Pradesh, to know the DTPA-extractable micronutrientsviz., Zn, Fe, Mn, Cu and CaCO3. Surface soil samples were collected grid wise by using cadastral map of the study area and were analyzed for their fertility status. The DTPA-extractable micronutrients viz., Zn, Fe, Mn, and Cu ranged from 0.24 to 1.61mg kg-1, 3.9 to19.95 mg kg-1, 1.25 to 9.85 mg kg-1, 0.18 to 2.58 mg kg-1 respectively and CaCO3from 1.25 to 12.5 %. Out of 190 samples, analyzed, 51% samples having less than 6.0%CaCO3 content, 49% samples were having between 6 to 18 %. CaCO3 content. About 42.1% samples of the district is deficient in Zn, and Deficiency of Fe, Mn and Cu is negligible. spatial variability Soil fertility maps of soil attributes could be used as a guide for site-specific nutrient management in similar soils.The available nitrogen was low, phosphorus content ranged from low to medium, and potassium content ranged from medium to high. Using the results of the field survey and laboratory study, the soil heterogeneity units were calculated using Arc-GIS 10.4.1.