Soil Nutrient Index of the Semi-Arid Region of Kolar Taluk, Karnataka, India

Ashwini K.B

doi:https://doi.org/10.14445/IJAES-V13I1P101

Research Article | Open Access

Volume 13 | Issue 1 | Year 2026 | Article Id. IJAES-V13I1P101 | DOI : https://doi.org/10.14445/IJAES-V13I1P101

Soil Nutrient Index of the Semi-Arid Region of Kolar Taluk, Karnataka, India

Ashwini K.B, K.L. Prakash

Received	Revised	Accepted	Published
01 Dec 2025	03 Jan 2026	21 Jan 2026	05 Feb 2026

Citation :

Ashwini K.B, K.L. Prakash, "Soil Nutrient Index of the Semi-Arid Region of Kolar Taluk, Karnataka, India," International Journal of Agriculture & Environmental Science, vol. 13, no. 1, pp. 1-7, 2026. Crossref, https://doi.org/10.14445/IJAES-V13I1P101

Abstract

A study highlights the estimation of soil nutrient content of thirty-seven samples that were collected randomly in Kolar Taluk during the pre-monsoon season, 2022. Kolar Taluk lies geographically between 13° 02′ 03′′ and 13°19′11′′ Northern Latitudes and 77° 56′ 02′′ and 78° 13′ 02′′ eastern longitudes. The Organic Carbon, available Phosphorus, and Potassium were analyzed as per Standard Methods. The results of the soil fertility level showed little variation across different landforms. Organic matter and its decomposition rate differed among the soils. 2.4 to 3.4% of organic carbon. 97% had a higher level of Phosphorus with a range of 33.80 -511.13 kg/ha, whereas 54.05% were doubtful. The available potash supply is 113.42-279.05 kg/ha. ESP, SAR ratio indicated that the soils were found to be highly suitable for irrigation. The quality of Soil falls into the High-High-Low (HHL) category as per the nutrient index. This classification is primarily based on the amount of available Phosphorus, Organic Carbon, and Potassium, and these index values would help in the maintenance of soil fertility and suitable crops.

Keywords

Macro Nutrients, Nutrient Index Approach, SAR, ESP, Available Potash.

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