Temporal stability of soil apparent electrical conductivity (ECa) in managed podzols

Badewa, Emmanuel; Unc, Adrian; Cheema, Mumtaz; Galagedara, Lakshman

doi:10.1007/s11600-019-00306-1

Cited by 3 publications

(2 citation statements)

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“…Therefore, electrical resistivity, EMI, and TDR techniques are widely used as alternative methods. However, these alternative methods provide the σ a of the subsurface but not the σ w or σ e [146,[149][150][151][152][153][154]. The three main current flow pathways contributing to the σ are the liquid, solid-liquid, and solid phases [150,155].…”

Section: Soil Salinitymentioning

confidence: 99%

“…Three pathways of current flows are responsible for the soil σ a (see Section 3.2.3). The interpretation of σ a is complex and based on several soil properties such as soil salinity, SWC, soil porosity, bulk density (compaction), SOM, CEC, clay content, and temperature [147,150,153,[199][200][201][202].…”

Section: Basic Operating Principles Of Electromagnetic Inductionmentioning

confidence: 99%

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Ground-Penetrating Radar and Electromagnetic Induction: Challenges and Opportunities in Agriculture

et al. 2023

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Information on the spatiotemporal variability of soil properties and states within the agricultural landscape is vital to identify management zones supporting precision agriculture (PA). Ground-penetrating radar (GPR) and electromagnetic induction (EMI) techniques have been applied to assess soil properties, states, processes, and their spatiotemporal variability. This paper reviews the fundamental operating principles of GPR and EMI, their applications in soil studies, advantages and disadvantages, and knowledge gaps leading to the identification of the difficulties in integrating these two techniques to complement each other in soil data studies. Compared to the traditional methods, GPR and EMI have advantages, such as the ability to take non-destructive repeated measurements, high resolution, being labor-saving, and having more extensive spatial coverage with geo-referenced data within agricultural landscapes. GPR has been widely used to estimate soil water content (SWC) and water dynamics, while EMI has broader applications such as estimating SWC, soil salinity, bulk density, etc. Additionally, GPR can map soil horizons, the groundwater table, and other anomalies. The prospects of GPR and EMI applications in soil studies need to focus on the potential integration of GPR and EMI to overcome the intrinsic limitations of each technique and enhance their applications to support PA. Future advancements in PA can be strengthened by estimating many soil properties, states, and hydrological processes simultaneously to delineate management zones and calculate optimal inputs in the agricultural landscape.

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