Laboratory and Field Assessment of the Decagon 5TE and GS3 Sensors for Estimating Soil Water Content in Saline-Alkali Reclaimed Soils

Son, Jae-Kwon; Shin, Won-Tae; Cho, Jae-Young

doi:10.1080/00103624.2017.1411501

Cited by 14 publications

(8 citation statements)

References 20 publications

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“…This has been examined and confirmed by Son et al. (2017) in soils with different textures (e.g., silty clay). The pits were spaced 20 m apart.…”

Section: Methodssupporting

confidence: 59%

“…The reason it was selected was that factory calibration for θ is accurate to ±0.03 m 3 m −3 in mineral soils when the bulk soil EC is <10 dS m −1 . This has been examined and confirmed by Son et al (2017) in soils with different textures (e.g., silty clay). The pits were spaced 20 m apart.…”

Section: Soil Moisture Sensors Installation and Soil Samples Collectionmentioning

confidence: 76%

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Time‐lapse imaging of soil moisture using electromagnetic conductivity imaging: Wetting phase

Zare

Arshad

et al. 2021

Soil Science Soc of Amer J

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The Vertosols of the lower Namoi valley in New South Wales, Australia, have been extensively developed for irrigated cotton (Gossypium hirsutum L.) production. However, there are competing demands for water from mining, environmental needs, and agriculture, with climate change forecasts suggesting reduced rainfall and hotter climates. This means irrigators need to improve water efficiency, which requires methods to monitor the soil volumetric water content (θ, m 3 m -3 ). The aim of this study is to assess if a multicoil electromagnetic instrument (DUALEM-421), which measures soil apparent electrical conductivity (EC a , mS m -1 ), can be used to value add to limited measurements of θ and allow extrapolation along a uniformly heavy clay irrigation furrow. Specifically, we seek to invert EC a using EM4Soil software to generate electromagnetic conductivity images, whereby the estimates of soil true electrical conductivity (σ, mS m -1 ) in the topsoil, subsurface, and subsoil are correlated with θ measured by Decagon GS3 sensors installed at the same depths. We also compared the usefulness of inversion of different combinations of DUALEM EC a : DUALEM-1, DUALEM-2, and DUALEM-21. We found estimated σ from inversion of DUALEM-421 EC a had good agreement (i.e., Lin's concordance = .84) with measured soil bulk electrical conductivity (σ b , mS m -1 ). We explored the relationship between DUALEM-421 estimated σ and θ using an artificial neural network. The predictions showed the model had good coefficient of determination (R 2 = .74) with good accuracy (RMSE = 0.04 m 3 m -3 ) and demonstrated good agreement between measured and predicted θ (Lin's = .84).

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“…This has been examined and confirmed by Son et al. (2017) in soils with different textures (e.g., silty clay). The pits were spaced 20 m apart.…”

Section: Methodssupporting

confidence: 59%

Section: Soil Moisture Sensors Installation and Soil Samples Collectionmentioning

confidence: 76%

Time‐lapse imaging of soil moisture using electromagnetic conductivity imaging: Wetting phase

Zare

Arshad

et al. 2021

Soil Science Soc of Amer J

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“…This is likely caused by the finer sampling interval of the FO-DTS at every 0.5 m against the very small scale (local) measurements used to represent the VWC at 10 m sampling interval with the GS3 layout. In addition, the GS3 probes are influenced by many factors, such as mineralogy, electric conductivity of the water, and contact between the soil and the probe (Son et al 2017). As the volume of measurement of this probe is small, large particles (and pores) near the probe could affect significantly the output.…”

Section: Assessment Of Active Fo-dts Datamentioning

confidence: 99%

Fiber Optic Measurements of Soil Moisture in a Waste Rock Pile

Wu¹,

Martin

McKenzie

et al. 2021

Groundwater

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The design and construction of a waste rock pile influences water infiltration and may promote the production of contaminated mine drainage. The objective of this project is to evaluate the use of an active fiber optic distributed temperature sensing (aFO-DTS) protocol to measure infiltration and soil moisture within a flow control layer capping an experimental waste rock pile. Five hundred meters of fiber optic cable were installed in a waste rock pile that is 70 m long, 10 m wide, and was covered with 0.60 m of fine compacted sand and 0.25 m of non-reactive crushed waste rock. Volumetric water content was assessed by heating the fibre optic cable with 15-minute heat pulses at 15 W/m every 30 minutes. To test the aFO-DTS system 14 mm of recharge was applied to the top surface of the waste rock pile over 4 hours, simulating a major rain event. The average volumetric water content in the FCL increased from 0.10 to 0.24 over the duration of the test. The volumetric water content measured with aFO-DTS in the FCL and waste rock was within ± 0.06 and ± 0.03, respectively, compared with values measured using 96 dielectric soil moisture probes over the same time period. Additional results illustrate how water can be confined within the FCL and monitored through an aFO-DTS protocol serving as a practical means to measure soil moisture at an industrial capacity.

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“…The volumetric soil moisture (θ) was evaluated at 167, 220, 240, and 286 DAS at a depth between 0-10 cm on nine plants per treatment recorded with a GS3 sensor (METER Group. Inc., Pullman, WA, USA) (Son et al, 2017). The soil water potential (Ψs) was calculated using Eq.…”

Section: Soil Water Potentialmentioning

confidence: 99%

High population density in arracacha (Arracacia xanthorrhiza Bancroft) increase radiation interception, yield, and profitability

et al. 2021

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Introduction. Arracacha (Arracacia xanthorrhiza Bancroft) a promising crop due to its nutritional and gastronomic relevance. Population density is an agronomic practice that increases water and radiation use efficiencies, maximizes the yield, and crop profitability. However, the selection of the optimal population density based on physiological, agronomic, and economic criteria for arracacha has not been studied. Objective. To describe the effect of different population densities on the physiology, yield, and profitability of arracacha. Materials and methods. The experiment was conducted in Cajamarca, Colombia in 2019. There, the soil water potential, relative chlorophyll content, photosynthesis, stomatal conductance, water use efficiency, leaf temperature depression, photosynthetic reflectance index, leaf area index, the fraction of light interception, light extinction coefficient, cracking index, yield, and profitability were evaluated. Results. The results showed that high population densities did not generate water deficit because there were no significant differences for the soil water potential, leaf temperature depression, and photosynthetic reflectance index. Furthermore, no nutritional deficiencies were evidenced because the relative chlorophyll content (<32 SPAD) was higher at the critical level. Due to this, no limitations were observed in leaf gas exchange processes. However, the densities of 25,000 and 30,000 plants ha-1 showed a higher fraction of light interception due to the increase in the leaf area index; this allowed to obtain a higher yield at these densities. Conclusion. The maximum yield (41.96 t ha-1) and profitability (US$ 15,333.06 ha-1) were reached with a population density of 22,222 plants ha-1.

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Laboratory and Field Assessment of the Decagon 5TE and GS3 Sensors for Estimating Soil Water Content in Saline-Alkali Reclaimed Soils

Cited by 14 publications

References 20 publications

Time‐lapse imaging of soil moisture using electromagnetic conductivity imaging: Wetting phase

Time‐lapse imaging of soil moisture using electromagnetic conductivity imaging: Wetting phase

Fiber Optic Measurements of Soil Moisture in a Waste Rock Pile

High population density in arracacha (Arracacia xanthorrhiza Bancroft) increase radiation interception, yield, and profitability

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