The Effects of Magnetic Water on the Measurement Accuracy of Water Content by TDR Device under Different Soil Textures

Authors

1 MSc student, Department of Water engineering, Faculty of Agriculture, Ferdowsi university of Mashhad, Mashhad, Iran.

2 Water Science and Engineering Dept.- Faculty of Agriculture, Ferdowsi University of Mashhad

3 Department of water engineering, Faculty of Agricultural, Ferdowsi University of Mashhad, Mashhad, Iran

Abstract

Soil moisture is one of the important determinants of soil behavior in water and soil investigation. The usual methods of measuring soil moisture are very time consuming and costly. This study was aimed to evaluate the effect of magnetic irrigation water on measurement accuracy of water content of the soil by TDR device. In this study three soil textures (silty clay, sandy loam and clay loam) were exposed to different levels of magnetic field (0, 0.3 and 0.6 T). Soil moisture was estimated using a TDR and compared with volumetric values of soil moisture. The results showed that the device has the highest accuracy in the sandy loam soil under different levels of magnetic irrigation water. RMSE in well water, magnetic water of 0.3 tesla, and magnetic water of 0.6 tesla were 15.2, 3.3, and 2.5, respectively. By increasing the clay content, the accuracy of the device is reduced. The drawing of the coherence chart between the results of the TDR method and the volumetric method showed that the highest and the least coincidence between the two methods were in sandy loam + irrigation with magnetic water of 0.6 T (R2 = 0.92) and clay loam soils + well water (R2 = 0.42). The results showed that, using magnetic water in irrigation lead to increase of device accuracy in different soil textures.

Keywords

References

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Water and Soil Science
Volume 31, Issue 3
September 2021
Pages 61-72

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