Review of Novel and Emerging Proximal Soil Moisture Sensors for Use in Agriculture

Hardie, M

doi:10.3390/s20236934

Cited by 73 publications

(38 citation statements)

References 146 publications

(217 reference statements)

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“…More research is needed with sensitive specific-ion content sensors. We point to the use of TDR sensors, that better discriminate soil water content from salinity measurements (see Equation ( 4)), for automated irrigation soil-sensor-based using poor quality water (Hardie, 2020).…”

Section: Automatic Irrigation Managementmentioning

confidence: 99%

Towards irrigation automation based on dielectric soil sensors

Vera

Conejero

Mira-García

et al. 2021

The Journal of Horticultural Science and Biotechnology

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A comprehensive review of automation of irrigation based on volumetric soil water content (VSWC) in the framework of IoT (Internet of Things) is presented. The fundamentals of electromagnetic sensors based on soil dielectric permittivity and the techniques used for measuring the VSWC are briefly described. Factors affecting sensor performance that have to be considered for selecting the appropriate sensor along with a SWOT (Strengths, Weaknesses, Opportunities and Threats) analysis are outlined. Special attention must be paid to the small soil volume explored by these sensors, installation accuracy, calibration, power supply and consumption and the effects of salinity on the soil water content. Since it is connected to a telemetry system, a wireless sensor network should include robust transmission units, energy-efficient processor, flexible configuration of the I/O ports, long-life battery, and a friendly software platform. A bidirectional wireless network layout allows sensor activity to be monitored, acts on solenoid valves to trigger irrigation (based either on direct VSWC values or algorithms) and provides real-time feed-back information of the soil-plant-atmosphere continuum. As revealed by the field research studies, significantly higher water, energy and labour savings were possible using automated irrigation based on VSWC sensors than with conventional irrigation scheduling based on computed evapotranspiration.

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Section: Automatic Irrigation Managementmentioning

confidence: 99%

Towards irrigation automation based on dielectric soil sensors

Vera

Conejero

Mira-García

et al. 2021

The Journal of Horticultural Science and Biotechnology

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“…Change in sediment moisture storage, Δ S , is typically measured by one or more soil moisture sensors that quantify the dielectric constant of moist soil, which is strongly related to soil water content; other methods are under development in agricultural settings (Hardie, 2020) but not yet translated to salt marsh studies. However, among the most common soil moisture sensors, soil moisture resistance sensors (e.g., gypsum block or similar) do not work in saline environments, tensiometers might become clogged by air or (bio)solids among rapidly oscillating flow directions.…”

Section: Approaches For Determining Surface Water and Groundwater Int...mentioning

confidence: 99%

Surface Water and Groundwater Interactions in Salt Marshes and Their Impact on Plant Ecology and Coastal Biogeochemistry

Xin

Wilson

Shen

et al. 2022

Reviews of Geophysics

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Salt marshes are highly productive intertidal wetlands providing important ecological services for maintaining coastal biodiversity, buffering against oceanic storms, and acting as efficient carbon sinks. However, about half of these wetlands have been lost globally due to human activities and climate change. Inundated periodically by tidal water, salt marshes are subjected to strong surface water and groundwater interactions, which affect marsh plant growth and biogeochemical exchange with coastal water. This paper reviews the state of knowledge and current approaches to quantifying marsh surface water and groundwater interactions with a focus on porewater flow and associated soil conditions in connection with plant zonation as well as carbon, nutrients, and greenhouse gas fluxes. Porewater flow and solute transport in salt marshes are primarily driven by tides with moderate regulation by rainfall, evapotranspiration and sea level rise. Tidal fluctuations play a key role in plant zonation through alteration of soil aeration and salt transport, and drive the export of significant fluxes of carbon and nutrients to coastal water. Despite recent progress, major knowledge gaps remain. Previous studies focused on flows in creek‐perpendicular marsh sections and overlooked multi‐scale 3D behaviors. Understanding of marsh ecological‐hydrological links under combined influences of different forcing factors and boundary disturbances is lacking. Variations of surface water and groundwater temperatures affect porewater flow, soil conditions and biogeochemical exchanges, but the extent and underlying mechanisms remain unknown. We need to fill these knowledge gaps to advance understanding of salt marshes and thus enhance our ability to protect and restore them.

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“…The technology of irrigation systems has already reached a high level. However, the associated measurement systems for determining soil moisture in agriculture are limited [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, dielectric sensors are inexpensive, require little maintenance, and have low power consumption [12]. Only a few sensors described in the literature are commercially available, and the market is dominated by a small number of devices (see Table 1) [8][9][10]. For further information on commercially available sensor systems, see ref.…”

Section: Introductionmentioning

confidence: 99%

Robust Soil Water Potential Sensor to Optimize Irrigation in Agriculture

Menne

Hübner²,

Trebbels³

et al. 2022

Sensors

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Extreme weather phenomena are on the rise due to ongoing climate change. Therefore, the need for irrigation in agriculture will increase, although it is already the largest consumer of water, a valuable resource. Soil moisture sensors can help to use water efficiently and economically. For this reason, we have recently presented a novel soil moisture sensor with a high sensitivity and broad measuring range. This device does not measure the moisture in the soil but the water available to plants, i.e., the soil water potential (SWP). The sensor consists of two highly porous (>69%) ceramic discs with a broad pore size distribution (0.5 to 200 μm) and a new circuit board system using a transmission line within a time-domain transmission (TDT) circuit. This detects the change in the dielectric response of the ceramic discs with changing water uptake. To prove the concept, a large number of field tests were carried out and comparisons were made with commercial soil water potential sensors. The experiments confirm that the sensor signal is correlated to the soil water potential irrespective of soil composition and is thus suitable for the optimization of irrigation systems.

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Review of Novel and Emerging Proximal Soil Moisture Sensors for Use in Agriculture

Cited by 73 publications

References 146 publications

Towards irrigation automation based on dielectric soil sensors

Towards irrigation automation based on dielectric soil sensors

Surface Water and Groundwater Interactions in Salt Marshes and Their Impact on Plant Ecology and Coastal Biogeochemistry

Robust Soil Water Potential Sensor to Optimize Irrigation in Agriculture

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