790 results
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Journal Article
Dynamic soil water retention properties: Exploring the interplay of moisture states and soil structure dynamics in a compacted Andosol
Abstract The influence of soil structure dynamics on spatiotemporal variability in soil water flows and distribution is generally omitted in hydrological modeling across scales. Soils like Andosols exhibit important structural dynamics, which affects the accurate representation of soil water…
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Journal Article
Using relative gas diffusivity to highlight soil compaction issues with possible effects on N efficiency in grain corn production, southern Quebec, Canada
Abstract It has long been suggested that soil compaction indices should be monitored as part of a routine soil management program. Moreover, in addition to properties related to storage of gases and fluid within a bulk volume (i.e., bulk density [BD] and air porosity [θa]), some authors have…
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Journal Article
Exploring the connection between critical zone structure and tree distribution in a semiarid eroding landscape with shallow seismic refraction
Abstract This study explores the impact of deep (5–40 m) critical zone (CZ) structure on vegetation distribution in a semiarid snow‐dominated climate. Utilizing seismic refraction surveys, we identified a significant negative correlation between seismically derived saprolite thickness and light…
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Journal Article
Limiting air bubble formation during X‐ray CT fast scanning of rewetted soils
Abstract The microscale distribution of air, water, and solids determines many aspects of soil functionality. There is increasing interest in drying‐rewetting cycles impacts on soil structural dynamics and water redistribution. However, resolving these dynamics over short timescales with X‐ray…
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Journal Article
Modeling nitrate leaching risk from flood managed aquifer recharge in California's agricultural lands
Abstract Flood managed aquifer recharge (Flood‐MAR) is an emerging practice to enhance groundwater sustainability through recharge of aquifers. However, in agricultural systems Flood‐MAR may harm groundwater quality, given residual soil nitrate (NO3−). This research evaluated Flood‐MAR NO3−…
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Journal Article
Evaporation‐induced salt precipitation and feedback on water–heat transport in saline soil
Abstract The precipitation and growth of salt crystals significantly affect soil water and heat balance. However, the effects of salt precipitation on water–heat flow in unsaturated soil remain unclear. Therefore, we investigated the influence mechanisms of salt precipitation on water and heat…
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Journal Article
Multi‐layer root zone soil moisture estimation using field and remote sensing data fusion with machine learning in semi‐arid croplands
Abstract This study aims to estimate multi‐layer soil moisture (SM) in 30‐cm increments up to 180 cm by integrating multimodal sub‐field and remote sensing data and applying machine learning algorithms. PlanetScope (optical sensor) data, climatic variables, and in situ soil properties were used as…
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Journal Article
A novel method to assess the infiltration and filtration functions of urban soils
Abstract Urban areas are increasingly under pressure due to rapid expansion and extreme rainfall events driven by climate change. Rather than relying solely on pipes to regulate stormwater, new management systems promote direct infiltration of water and pollutants into the soil. Soils fulfill…
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Journal Article
Hydraulic characteristics and model evaluation for silty sand affected by salt solution concentration
Abstract The hydraulic properties of silty sand are affected by a combination of internal and external factors such as the compaction, moisture content, and groundwater properties. This study investigated the measurement methods and hydraulic characteristics of unsaturated silty sand. Two…
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Journal Article
Can adoption of multispecies cover crop mixtures improve soil water movement in fragipan soils of southern Illinois?
Abstract Crop production on fragipan soils can be severely limited due to restrictive root growth and perched water table. We hypothesized that roots of multispecies cover crop mixtures containing annual ryegrass (ARG, Lolium multiflorum L.), hairy vetch (Vicia villosa), and crimson clover…
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Journal Article
Understanding the influence of Malta litho‐structural features on the dynamics of nitrate transport in the vadose zone
Abstract Coastal aquifers in the Mediterranean are increasingly stressed by climate change, intensive agriculture, and rising water demand. In Malta island, where groundwater is a key resource, nitrate contamination remains a persistent issue despite regulatory efforts and the designation of the…
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Journal Article
Spatial heterogeneity and driving factors of soil salinity in the lowland area of North China plain
Abstract Soil salinity is a serious threat to agricultural production in the lowland area around the world. Understanding the driving factors of soil salinity is crucial for management of saline‐alkaline land. This study collected soil samples at 98 profiles in various soil layers of 0–2 m in…
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Journal Article
Field evaluation of the SoilVUE10 time domain reflectometry soil moisture profiling sensor under different installation methods
Abstract Accurate monitoring of soil profile water content is essential for agronomic and environmental applications. Time domain reflectometry (TDR) sensors estimate volumetric water content from bulk soil dielectric permittivity. The SoilVUE10 is a high‐frequency TDR sensor designed to measure…
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Journal Article
Modeling saffron corm production under climate change using Hydrus‐1D enhanced with a novel crop yield module
Abstract Saffron (Crocus sativus L.) is an ideal crop for arid and semiarid regions due to its low water requirement and high economic value. This study involves calibration and validation of the Hydrus‐1D model in order to explore the influence of climate change on saffron corm production. The…
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Journal Article
Sustainable agro‐management practices mitigate soil salinity relative to pre‐cultivation levels
Abstract Soil salinity and sodicity are major constraints to sustainable agriculture in arid and semi‐arid regions. Despite extensive research on remediation practices, the lack of integrated frameworks for quantifying saline‐sodic soil degradation has impeded the translation of site‐level findings…
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Journal Article
Estimation of dual permeability model parameters in agricultural fields using a genetic algorithm‐based inverse modeling framework
Abstract Macropores significantly influence water movement in agricultural fields. The dual permeability model (DPM) is generally used to simulate flow in macroporous soils. However, the parameters of DPM are poorly defined and difficult to measure, impeding its applicability at various…
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Journal Article
Modeling the influence of rhizodeposits on root water uptake
Abstract The chemical compounds that plant roots release into the soil, referred to as rhizodeposits, affect soil hydraulic properties like the surface tension and viscosity of soil water, and the contact angle between menisci and the pore surface. What remains less clear is how these effects…
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Journal Article
Machine‐learning based spatiotemporal prediction of soil moisture in a grassland hillslope
Abstract Soil moisture (SM) plays a significant role in the earth's water balance and in optimizing land management practices. However, SM at the field scale is difficult to map from available point measurements due to the inherent heterogeneity of soil and terrain properties and temporal dynamics…
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Journal Article
The value of long‐term in situ soil moisture and snowpack monitoring: Laying the foundation for future studies in the Upper Missouri River Basin
Abstract In recent decades, the Upper Missouri River Basin (UMRB) has experienced record floods (2011 and 2019) and severe flash droughts (2012 and 2017). These natural disasters are closely associated with soil moisture and snowpack conditions, and are expected to increase in frequency in the…
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Journal Article
Evaluating the efficacy of fractal models for soil water retention curve estimation from particle‐size distribution for Hanford sediments
Abstract Soil water retention curve (SWRC) is a key characteristic widely used to study single‐ and multi‐phase flow and transport in porous media. Since its direct measurement is time‐ and labor‐consuming, numerous empirical and theoretical approaches were developed to estimate it from…