Mishra, Preity and Chaulya , Swades Kumar and Kumari, Anubhuti and Kumar, Naresh (2026) Soil Nutrient Assessment Using Ion‑Selective Electrode‑Based Nutrient Analyzer for Precision Agriculture. Intelligent Agriculture, 2 (1).
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Rapid and accurate soil nutrient assessment is critical for precision agriculture. This study presents a portable and intelligent soil nutrient analyzer based on ion‑selective electrodes (ISE) for rapid, on‑site estimation of potassium, nitrate, and chloride. Unlike image‑based or machine learning approaches that rely on indirect infer‑ ence, the proposed system directly measures ion activity using electrochemical sensing, ensuring higher reliability under field conditions. The device integrates sensing, signal conditioning, self‑calibration using polynomial regres‑ sion, and wireless data transmission for real‑time soil health assessment. A total of 546 soil samples collected from diverse agricultural locations in Dhanbad district, India, were used for validation, with measurements compared against standard laboratory methods including flame photometry and UV‑Vis (ultraviolet‑visible) spectrophotom‑ etry. The developed system achieved high correlation coefficients of 0.994 (potassium), 0.933 (nitrate), and 0.946 (chloride). Statistical evaluation using RMSE (root mean square error), measurement uncertainty, and hypothesis testing confirms the robustness of the calibration model. The study highlights the advantages of direct sensing over image‑based prediction methods, particularly in terms of accuracy, environmental robustness, and practical deploy‑ ment. Limitations related to sensor drift, soil heterogeneity, and field conditions are also discussed. The proposed system provides a scalable and cost‑effective solution for precision agriculture and real‑time soil monitoring.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Soil Nutrient Analysis; Ion‑Selective Electrodes; Precision Agriculture; Soil Nutrient Prediction |
| Subjects: | Instrumentation |
| Divisions: | UNSPECIFIED |
| Depositing User: | Mr. B. R. Panduranga |
| Date Deposited: | 11 Jun 2026 07:32 |
| Last Modified: | 11 Jun 2026 07:32 |
| URI: | https://cimfr.csircentral.net/id/eprint/3022 |
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