GIS-Aided Mapping of Macronutrients in the Rice Growing Soils of Karimnagar District in Telangana State, India
Nature Environment and Pollution Technology p-ISSN: 0972-6268 Vol. 16 No. 2 pp. 493-498 2017 An International Quarterly Scientific Journal e-ISSN: 2395-3454 Original Research Paper Open Access GIS-Aided Mapping of Macronutrients in the Rice Growing Soils of Karimnagar District in Telangana State, India P. Ravi*†, G. Bhupal Raj*, G. Jayasree* and G. S. Pratyusha Kranthi** *Department of Soil Science and Agricultural Chemistry, College of Agriculture, PJTSAU, Hyderabad, Telangana, India **CRIDA, Hyderabad, Telangana, India †Corresponding author: P. Ravi ABSTRACT Nat. Env. & Poll. Tech. Website: www.neptjournal.com A systematic set of geo-referenced 154 soil samples were collected from the Karimnagar district, Received: 19-05-2016 Telangana state, India, covering the entire rice growing area using GPS (Global positioning system) Accepted: 16-07-2016 and the maps showing the spatial variability of individual macronutrients (N, P, K and S) were generated using Arc-info GIS (Geographic information system). The soil samples were analysed for physico- Key Words: chemical properties and available macronutrients. The available N status ranged from 119.17-784.0 kg Macronutrients ha-1 while the available P, K and S status varied from 12.61-88.46 kg ha-1, 105.68-754.4 kg ha-1 and Rice growing soils 5.85-75.5 mg kg-1 respectively. Analytical results and the GPS data were used for the preparation of GIS-aided mapping thematic map showing spatial distribution of N, P, K and S status, mandal-wise in the district. Locations of soil sampling sites of Karimnagar district were marked on the base map on 1:50,000 scale prepared from state revenue maps and digitized using Arc-info GIS.
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