In-Situ Estimation of Soil Water Retention Curve in Silt Loam and Loamy Sand Soils at Different Soil Depths

Zeitoun, Reem; Vandergeest, Mark; Vasava, Hitesh B.; Machado, Pedro Vitor Ferrari; Jordan, Sean; Parkin, Gary; Wagner‐Riddle, Claudia; Biswas, Asim

doi:10.3390/s21020447

Cited by 13 publications

(8 citation statements)

References 31 publications

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“…In ltration, the rate at which water enters the soil, is controlled by several factors (e.g., soil texture, soil water content, rate of air ow, etc.) (Zeitoun et al, 2021). Within the soil medium, the difference of total soil pore water pressure is decisive on the direction of water migration (Al-Kaisi et al, 2017).…”

Section: Conceptual Model Of Pedogenic Carbonate Formation and Transp...mentioning

confidence: 99%

Reactive transport modeling of carbon capture in soil amended with fast weathering silicate minerals

Khalidy,

Chiang,

Santos

2024

Preprint

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Mineralization of powder form of fast-weathering silicate minerals (e.g., wollastonite and diopside) is reckoned as a stable and relatively low-cost method for sequestrating atmospheric CO2 in agricultural and urban soils. While the process, called terrestrial enhanced weathering, has well shown the capacity of carbon drawdown in lab and field scale studies, the long-term evolution of formation/redissolution of weathering product is less discussed in the literature. This study assesses long-term carbonate formation and migration over the soil profile with a reactive transport model built within the Geochemist Workbench software package. The model is built on the basis of experimental design/ procedure conditions and accounts for intermittent irrigation regimes and kinetic dissolution/precipitation of minerals as well as calcite formation. Simulation results are indicative of the growth of sequestrated carbon beyond the short-term duration (up to 8.3 t CO2/ha) with dissolved form (e.g., bicarbonates) growing over time. The model also predicts a slow migration of carbonates to deeper layers over five years. The modeling outputs are inconsistent with experimental observations, highlighting inflow rate as a driving factor in the formation of carbonates and mass of dissolved carbonate efflux from the system.

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Section: Conceptual Model Of Pedogenic Carbonate Formation and Transp...mentioning

confidence: 99%

Reactive transport modeling of carbon capture in soil amended with fast weathering silicate minerals

Khalidy,

Chiang,

Santos

2024

Preprint

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“…The facility is under a humid continental climate (Dfb) according to the Köppen-Geiger classification system (Peel et al, 2007), with a mean annual temperature of 6.6 °C and average annual precipitation of 879 mm (ECCC, 2020). Detailed information on lysimeter installation and operation is presented in Lapierre et al (2022), Zeitoun et al (2021), andBrown et al (2021). A brief description is provided here.…”

Section: Research Site and Infrastructurementioning

confidence: 99%

“…This soil has a particle distribution in the 0-32 cm horizon of 38.0, 54.5, and 7.5%, sand, silt, and clay, respectively-a silt loam A horizon (SIL). The remaining 9 cores were extracted at a farm situated in Cambridge, Ontario, Canada (43 o 27'27.6″ N 80 o 20'47.5″ W), a coarser brunisolic grey-brown luvisol with a particle distribution in the 0-28 cm horizon of 79.2, 17.5, and 3.3%, sand, silt, and clay, respectively-a loamy sand A horizon (LS) (Zeitoun et al, 2021).…”

Section: Research Site and Infrastructurementioning

confidence: 99%

Winter warming effects on soil nitrate leaching under cover crops: A field study using high-frequency weighing lysimeters

Lapierre

Machado²,

Debruyn³

et al. 2022

Front. Environ. Sci.

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Leaching of nitrate (NO3−)—a reactive nitrogen form with impacts on ecosystem health—increases during the non-growing season (NGS) of agricultural soils under cold climates. Cover crops are effective at reducing NGS NO3− leaching, but this benefit may be altered with less snow cover inducing more soil freezing under warmer winters. Our objective was to quantify the effect of winter warming on NO3− leaching from cover crops for a loamy sand (LS) and a silt loam (SIL) soil. This research was conducted over 2 years in Ontario, Canada, using 18 high-precision weighing lysimeters designed to study ecosystem services from agricultural soils. Infra-red heaters were used to simulate warming in lysimeters under a wheat-corn-soybean rotation planted with a cover crop mixture with (+H) and without heating (-H). Nitrate leaching determination used NO3− concentration at 90 cm (discrete sampling) and high temporal resolution drainage volume measurements. Data were analyzed for fall, overwinter, spring-thaw, post-planting, and total period (i.e., November 1 to June 30 of 2017/2018 and 2018/2019). Warming significantly affected soil temperature and soil water content—an effect that was similar for both years. As expected, experimental units under + H presented warmer soils at 5 and 10 cm, along with higher soil water content in liquid form than –H lysimeters, which translated into higher drainage values for + H than –H, especially during the overwinter period. NO3− concentrations at 90 cm were only affected by winter heating for the LS soil. The drainage and NO3− concentrations exhibited high spatial variation, which likely reduced the sensitivity to detect significant differences. Thus, although absolute differences in NO3− leaching between LS vs. SIL and +H (LS) vs. –H (LS) were large, only a trend occurred for higher leaching in LS in 2018/2019. Our research demonstrated that soil heating can influence overwinter drainage (for LS and SIL soils) and NO3− concentration at 90 cm in the LS soil—important NO3− leaching controlling factors. However, contrary to our initial hypothesis, the heating regime adopted in our study did not promote colder soils during the winter. We suggest different heating regimes such as intermittent heating to simulate extreme weather freeze/thaw events as a future research topic.

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“…Various direct and indirect methods are available for measuring soil suction, including the Tensiometer method [9], pressure apparatus [10,11], and electrical resistance blocks [12], as well as the filter paper method [13]. In recent decades, several empirical models have been developed to predict SWCC, such as Gardner [14], Brooks Corey [15], Van Genuchten [16], and Fredlund and Xing [17], among others.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Soil-Water Characteristic Curves (SWCC) of Expansive Soil: Effects of Sand Content, Initial Saturation, and Initial Dry Unit Weight

Alnmr,

Alzawi,

Ray

et al. 2024

Water

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Soil-water characteristic curve (SWCC) is an essential parameter in unsaturated soil mechanics, and it plays a significant role in geotechnical engineering to enhance theoretical analysis and numerical calculations. This study investigated the effects of key factors, such as the percentage of sand, initial degree of saturation, and initial dry unit weight, on the SWCC of expansive soil by measuring the matric suction using a pressure apparatus method. The empirical equation of SWCC was obtained using the Van Genuchten and Fredlung Xing models, and the processing of experimental data checks the fitting of the two empirical models. The findings revealed that the Fredlung Xing model fit the relationship between matric suction and volumetric water content of expansive soil better than the Van Genuchten model, indicating that the pressure apparatus approach’s experimental data are correct and acceptable. The study also found that the matric suction increased with decreasing percentage of added sand at the same volumetric moisture content, and the increase in initial dry unit weight increased the matric suction, with the water retention capacity decreasing significantly after adding 20% sand. Moreover, as the initial degree of saturation increased, the volumetric water content decreased, and the characteristic curves became identical when the initial saturation degree reached 90%. Finally, to minimize the water retention capacity of expansive soils, the study recommended adding a percentage of sand not less than 30% to the expansive clay sample.

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In-Situ Estimation of Soil Water Retention Curve in Silt Loam and Loamy Sand Soils at Different Soil Depths

Cited by 13 publications

References 31 publications

Reactive transport modeling of carbon capture in soil amended with fast weathering silicate minerals

Reactive transport modeling of carbon capture in soil amended with fast weathering silicate minerals

Winter warming effects on soil nitrate leaching under cover crops: A field study using high-frequency weighing lysimeters

Experimental Investigation of the Soil-Water Characteristic Curves (SWCC) of Expansive Soil: Effects of Sand Content, Initial Saturation, and Initial Dry Unit Weight

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