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Artikel Jurnal
A mathematical model of tortuosity in soil considering particle arrangement
Abstract Tortuosity is an important parameter for studying the permeability of soil. Existing studies of soil tortuosity are usually of empirical nature and attempt to relate tortuosity to soil porosity alone. By assuming a laminar flow through the pores of two‐dimensional square solid particles…
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Artikel Jurnal
Simulation of spatial variability in crop leaf area index and yield using agroecosystem modeling and geophysics‐based quantitative soil information
Abstract Agroecosystem models that simulate crop growth as a function of weather conditions and soil characteristics are among the most promising tools for improving crop yield and achieving more sustainable agricultural production systems. This study aims at using spatially distributed crop growth…
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Artikel Jurnal
Increased irrigation water salinity enhances nitrate transport to deep unsaturated soil
Abstract Excessive use of N fertilizers in agriculture often leads to NO3− accumulation in the unsaturated zone and to groundwater pollution. There is uncertainty regarding the variability in fertilizer transport and uptake efficiency due to the lack of studies based on continuous nondestructive…
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Artikel Jurnal
Changes in water vapor adsorption and water film thickness in clayey materials as a function of relative humidity
Abstract Soil water, with adsorbed water being an important component, plays an important role in fluid flow and chemical movement in the unsaturated zone. The adsorbed water consists of water film and interlayer water, and its content is related to the relative humidity (RH). This study…
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Artikel Jurnal
Relationship between wheat root properties and its electrical signature using the spectral induced polarization method
Abstract Measuring root properties, the “hidden half” of the plant, is challenging due to their heterogeneous and dynamic nature. A promising method for noninvasive mapping of roots and their activity, spectral induced polarization (SIP), has been introduced. However, measurements of root…
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Artikel Jurnal
Differences in soil evaporation between row and interrow positions in furrowed agricultural fields
Abstract Although large‐scale center pivot sprinkler irrigation has replaced surface irrigation in many locations, the agricultural practice of growing crops in furrows remains common. Still, how the presence of elevated soil rows under sprinkler irrigation influences evaporation losses remains…
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Artikel Jurnal
Biologically influenced gas fluxes revealed by high‐resolution monitoring of unsaturated soil columns
Abstract Modulations of advective gas fluxes at the soil–atmosphere interface were investigated using an enhanced experimental setup developed to perform tracer gas percolation experiments through unsaturated soil columns under well‐controlled conditions associated with long‐term and…
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Artikel Jurnal
Inflation method based on confidence intervals for data assimilation in soil hydrology using the ensemble Kalman filter
Abstract The ensemble Kalman filter (EnKF) is a widely used data assimilation method in soil hydrology. However, underestimation of the modeling errors and of the sampling errors may cause systematic reduction of state variances and rejection of the observations. Inflation methods are used to…
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Artikel Jurnal
Rock outcrops change infiltrability and water flow behavior in a karst soil
Abstract Rock outcrops are widespread across the surface of the earth, particularly in karst environments, and they play an important role in infiltration‐runoff processes by triggering preferential flow. However, the characteristics of the preferential flow network at the soil–rock interface and…
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Artikel Jurnal
Evaluating time domain reflectometry and coaxial impedance sensors for soil observations by the U.S. Climate Reference Network
Abstract The objective of this study was to evaluate the performance of two commercial‐grade electromagnetic sensors in measuring soil water content for the U.S. Climate Reference Network (USCRN). One sensor was a 50‐MHz coaxial impedance dielectric sensor (model HydraProbe, Stevens Water…
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Artikel Jurnal
Determination of the relative macroporosity and the effective aggregate width for different macropore geometries with disk infiltrometers
Abstract The relative macroporosity (wf) and the effective aggregate width (dag) are input parameters for several dual‐permeability models. As wf is geometrically related to dag, any improvement in its determination is directly extended to dag. The wf, as estimated by disk infiltrometers, applies…
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Artikel Jurnal
Mildly hydrophobic biobased mulch: A sustainable approach to controlling bare soil evaporation
Abstract Mulching with polyethylene film is the conventional approach to decrease evaporative water loss from agricultural soils, but it is not environmentally sustainable. In this study, a laboratory experiment was conducted to test the potential utility of partially polymerized soybean oil (PSO)…
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Artikel Jurnal
The effect of solid‐phase composition on the drying behavior of Markermeer sediment
Abstract We studied the drying behavior of slurries of Markermeer sediments in the Netherlands having different solid compositions. Natural processes such as sand–mud segregation and oxidation of organic matter were mimicked to analyze the effect of changes in sediment composition. Evaporation…
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Artikel Jurnal
Soil sodicity originating from marginal groundwater
Abstract Soil salinity and sodicity are among the oldest soil and groundwater pollution problems and are widespread across the globe. Where salinity affects crop water uptake and yield, sodicity may additionally cause poorly reversible soil structure degradation and a severely reduced hydraulic…
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Artikel Jurnal
Performance of preferential flow models in predicting infiltration through a remolded soil with artificial macropores
Abstract Preferential flow in soils contributes to water and contaminant leaching to groundwater and subsurface drains. At practical scales, preferential flow is often neglected due to the lack of consensus or guidance on how to simulate this process. Dual‐permeability (DP) approaches are a…
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Artikel Jurnal
Estimating coefficient of linear extensibility using Vis–NIR reflectance spectral data: Comparison of model validation approaches
Abstract The coefficient of linear extensibility (COLE) is used to classify soils according to their swell–shrink potential, and its estimation is crucial for engineering and agronomic applications. The aims of the study were (a) to develop a visible–near‐infrared spectroscopy (Vis–NIRS, 400–2,500…
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Artikel Jurnal
Soil water and fuel permeability of a Cambisol in southern Brazil and its spatial behavior: A case study
Abstract The high demand for fuel derived from oil increases the risk of environmental hazard in agricultural fields caused by accidents with the operation of machines and spotting of fuel on the ground. When these accidents occur, a part of the spilled fuel infiltrates and redistributes in the…
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Artikel Jurnal
A robust data‐worth analysis framework for soil moisture flow by hybridizing sequential data assimilation and machine learning
Abstract As the collection of soil moisture data is often costly, it is essential to implement data‐worth analysis in advance to obtain a cost‐effective data collection scheme. In previous data‐worth analysis, the model structural error is often neglected. In this paper, we propose a robust…
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Artikel Jurnal
Modeling water fluxes through containerized soilless substrates using HYDRUS
Abstract Containerized crop production can enhance plant health and ensure environmental sustainability, yet proper management requires improved understanding of water fluxes and storage within soilless substrates. Numerical simulation tools developed to simulate water movement in porous media…
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Artikel Jurnal
Nitrogen, irrigation, and alley management effects on nitrate leaching from raspberry
Abstract High NO3 concentrations in the Abbotsford‐Sumas aquifer are linked to raspberry (Rubus idaeus L.) production. Passive capillary wick samplers were used to quantify the impacts of N, irrigation, and alley managements on drainage and NO3 leaching from raspberry rows and alleys over 4 yr…