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


Alizadeh A, 2014. Soil, Water and Plant Relationship. Press in Sajad university of technology. 876 pp (in Persian).
Alizadeh H, Nouri-mohamadi M and Liaghat A, 2009. Evaluation of the effect of soil texture and compaction on the precision of water content measu-- ent by Theta Probe (model ML2). Iranian Water Researches Journal. 3(2): 19-29. (in Persian)
Chandler DG, Seyfried M, Murdock M and McNamara JP, 2004. Field calibration of water content reflectometers. Soil Science Society of America Journal. 68(5): 1501-1507.‏
Ferasati M and Rahmani M, 2016. Evaluation of Time Domain Reflectrometry Device in Saline Clay and Sandy Soils. Water and Soil Science. 26(2.2): 43-52. (in Persian)
Ghaedi S, Afrasiab P and Delbari M, 2018. The effect of irrigation water turbidity on measurement accuracy of water content by Theta prob device. Iranian journal of soil and water research. 49(4): 729-737. (in Persian)
Gong Y, Cao Q and Sun Z, 2003. The effects of soil bulk density, clay content and temperature on soil water content measurement using time‐domain reflectometry. Hydrological Processes. 17(18): 3601-3614.‏
Heidarpour M, Khoshravesh M and Moshaveri Y, 2016. Effect of magnetized saline water on soil and water amendment in trickle irrigation. Journal of Water and Soil Conservation. 23(2): 179-193. (in Persian)
Huang Q, Akinremi OO, Sri Rajan R and Bullock P, 2004. Laboratory and field evaluation of five soil water sensors. Canadian Journal of Soil Science. 84: 431-438.
Jacobsen OH and Schjonning P, 1993. A laboratory calibration of time domain reflectometry for soil water measurement including effects of bulk density and texture. Hydrology Journal. 151: 147-157.
Kamali K and Mahdian MH, 2009. Investigating the manufacture of TDR burials waveguides and ‎evaluation of their application in soil moisture estimation. Watershed engineering and management. 1(2): 111-118.
Keshavarzi M, Nazemi AH, Sadradini. SAA, Neyshabori MR and Nazeri A, 2013. Effect of Soil Textureon accuracy of Time DomaiReflectometry methods for Measurement of Soil Moisture Content. Irrigation and Water Engineering. 11: 14-23. (in Persian)
Khoshravesh M, Mostafazadeh‐Fard B, Mousavi SF and Kiani AR, 2011. Effects of magnetized water on the distribution pattern of soil water with respect to time in trickle irrigation. Soil Use and Management. 27(4): 515-522.‏
Lungader Madsen HE, 2004. Crystallization of calcium carbonate in magnetic field ordinary and heavy water. Journal of Crystal Growth. 267: 251-255.
Mazidi M and Maroufpoor E, 2013. Investigating the effect of soil organic matter on TDR calibration for moisture measurement. Journal of water research in agriculture. 27(4): 513-522. (in Persian)
Mazidi M, Maroufpoor E and Bahramnejad B, 2010. Investigation of Time Domain Reflectometery models accuracy for estimation of soil water content. Iranian Water Research Journal. 3(5): 41-52.
Maroufpoor I, Emamgholizadeh S, Torabi H and Behzadinasab M, 2009. Impact of soil texture on the calibration of TDR for water content measurement. Journal of Applied Science. 9(16): 2933-2940.‏
Metanat M, Banejad H, Gholizadeh M and Goldani M, 2018. Investigation the effect of different magnetized water intensities on quantitative and qualitative yield of radish. Iranian journal of irrigation and drainage. 12(2): 472-480.
Moradi Marjane E and Goldani M, 2011. Evaluation of different salicylic acid levels on some growth characteristics of pot marigold (Calendula officinalis L.) under limited irrigation. Environmental stress in crop science. 4(1): 33-45. (in Persian)
Mostafazadeh-Fard B, Khoshravesh M, Mousavi SF and Kiani AR, 2011. Effects of magnetized water and irrigation water salinity on soil moisture distribution in trickle irrigation. Journal of Irrigation and Drainage Engineering. 137(6): 398-402.
Persson M and Berndtsson R, 1998. Texture and electrical conductivity effects on temperature dependency in time domain reflectometry. Soil Science Society American Journal. 62: 887-893.
Roghani M, Emam jomee SR and Kamali K, 2012. The feasibility of making the burial sensors of the TDR machine and evaluating their performance in measuring soil moisture. Iranian journal of watershed management science. 17: 53-62. (in Persian)
Sarani N and Afrasiab P, 2012. Effect of soil texture on moisture measurement accuracy with Theta probe ML2 in Sistan region. pp. 17-18. In International Conference on Chemical, Ecology and Environmental Sciences (ICEES'2012) march.
Serrarens D, MacIntyre JL, Hopmans JW and Bassoi LH, 2000. Soil moisture calibration of TDR multilevel probes, Scientia. Agricola. 57(2):349-357.
Soltani mohammadi A, 2005. The effects of soil texture on calibration of TDR for measurement of soil moisture under Khouzestan soil condition. MSc thesis. Department of irrigation and drainage. Faculty of Water engineering. Shahid Chamran University. (in Persian)
Walker JP, 1999. Estimating soil moisture profile dynamics from near-surface soil moisture measurements and standard meteorological data. Ph.D thesis. The University of Newcastle: New South Wales, Australia.
Zarrinabadi IG, Razmjoo J, Mashhadi AA and Boroomand A, 2019. Physiological response and productivity of pot marigold (Calendula officinalis) genotypes under water deficit. Industrial Crops and Products. 139: 111488.‏