Assessment of Spatial Distribution of Major soil Nutrients in Bhagyanagar Subwatershed, Koppal District, Karnataka using GIS Techniques

Rajendra Hegde; R Srinivasan; K V Seema; S Srinivas; K V Niranjana; B A Dhanorkar

doi:10.53989/bu.ga.v11i2.22.1

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Geographical analysis

DOI: 10.53989/bu.ga.v11i2.22.1

Year: 2022, Volume: 11, Issue: 2, Pages: 11-15

Original Article

Assessment of Spatial Distribution of Major soil Nutrients in Bhagyanagar Subwatershed, Koppal District, Karnataka using GIS Techniques

Rajendra Hegde¹, R Srinivasan^1*, K V Seema¹, S Srinivas¹, K V Niranjana¹, B A Dhanorkar¹

¹ICAR-National Bureau of Soil Survey and Land Use Planning, Regional Centre, Bangalore, 560024

*Corresponding Author
Email: [email protected]

Received Date:22 January 2022, Accepted Date:22 December 2022

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

A study on the assessment of the spatial distribution of soil nutrients was conducted in the Bhagyanagar subwatershed of Koppal district, Karnataka using GIS techniques. A total of 592 surface soil samples (0-20 cm) were collected at 320 m grid interval and analyzed the soil properties. Selective soil properties were mapped viz., Soil Reaction (pH), Electrical Conductivity (EC), Organic Carbon (OC), Available Phosphorus (P2O5), and Available Potassium (K2O). The results of the spatial distribution of soil properties like pH show 23% and 14.34% of the area were strongly alkaline (pH 8.4-9.0), and very strongly alkaline (pH>9.0), respectively. Soils are non-saline (EC <2 dSm-1), OC rated from low (<0.5%) to high (>0.75%), the maximum area was occupied medium (37.5%) and low (22.67%), and 7% was high. Available phosphorus 54.87% of the area was medium (23-57 kg ha-1), and 6.74% was in low (<23 kg ha-1) rated. Similarly, Available potassium 45.44% of the area was medium (145-337 kg ha-1) and 20.33% in high (>337 kg ha-1). Spatial distribution of soil nutrients is most important to know the status of the soil fertility and assists in adjusting the fertilizer schedules to different crops in the Watershed.

Keywords: Spatial Distribution, Soil Nutrients, Organic Carbon, Phosphorus, Potassium

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© 2022 Hegde et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Published By Bangalore University, Bengaluru, Karnataka