GPS-GIS Based Assessment of Soil Micronutrients of Agriculture College Farm, Pune, India

Abstract

Present soil survey in College of Agriculture, Pune (Maharashtra) India was carried out during 2024 by using Global Positioning System (GPS) and Geographical Information System (GIS). was undertaken with 160 geo-referenced soil samples collected by randomized method. Out of 160 soil samples, 127 samples from Agronomy Farm and 33 samples were collected from Modi Baugh and Pathology Farm by using standard soil sampling procedure and were analysed for chemical properties at College of Agriculture, Pune with an objective to study assess the soil nutrient status, delineate soil fertility maps of College of Agriculture farm, Pune. The pH and EC of soils of Agronomy Farm was found in between 7.63 to 8.96 (mean 8.11) and 0.20 to 0.78 dS m-1 with mean 0.41 dS m-1 respectively. The organic carbon and calcium carbonate content of the Agronomy Farm was ranged from 0.10 to 0.73 per cent with mean 0.39 per cent and 10.25 to 27.5 per cent with mean 18.53 per cent respectively. The DTPA extractable micronutrients viz., iron, manganese, zinc and copper in soils ranged from 3.02 to 10.26 mg kg-1 (mean 4.71 mg kg-1), 3.61 to 11.47 mg kg-1(mean 7.06 mg kg-1), 0.66 to 3.58 mg kg-1 (mean 1.92 mg kg-1), 1.65 to 3.98 mg kg-1 (mean 3.00 mg kg-1) respectively. The soils of Modi Baugh and Pathology Farm showed pH and EC between from 7.52 to 8.45 with mean 7.85, and 0.21 to 0.64 dS m-1 with mean 0.45 dS m-1 respectively. The organic carbon content and calcium carbonate ranged from 0.17 to 0.62 per cent with mean 0.32 and 8.5 to 25.5 per cent with mean 14.1 per cent respectively. The DTPA extractable micronutrients viz, iron, manganese, zinc and copper present in soil ranged from 2.08 to 6.94 mg kg-1 (mean 4.51 mg kg-1), 3.25 to 10.28 mg kg-1 (mean 8.10 mg kg-1), 0.55 to 3.98 mg kg-1 (mean 2.15 mg kg-1), 2.25 to 3.91 mg kg-1 (mean 2.98 mg kg-1) respectively. Based on the GPS locations of samples and soil test results, soil fertility maps of College of Agriculture Farm, Pune were prepared by using Arc-GIS 10.8.2 for soil pH, EC, OC, CaCO3 and DTPA extractable micronutrients i.e Fe, Mn, Zn, Cu.