Location and expression of fragic soil properties in a loess-covered landscape, Southern Illinois, USA

Wilson, Michael; Indorante, S. J.; Lee, B.D.; Follmer, Leon R.; Williams, Dustin R.; Fitch, B. C.; McCauley, W. M.; Bathgate, J. D.; Grimley, David A.; Kleinschmidt, K.

doi:10.1016/j.geoderma.2009.03.003

Cited by 26 publications

(6 citation statements)

References 53 publications

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“…Fragipans are characteristic of mediumtextured soils from the middle latitudes and have been reported in the USA, Canada, New Zealand, the British Isles, the Czech Republic, Slovakia, Hungary, Romania, the Ukraine, France, Belgium, the Netherlands, Germany, Spain, Sweden, Italy and Poland (e.g. Ajmone-Marsan et al, 1994;Wilson et al, 2010;Witty and Knox, 1989).…”

Section: Introductionmentioning

confidence: 97%

Fragipan horizon degradation and bleached tongues formation in Albeluvisols of the Carpathian Foothills, Poland

Szymański

Skiba

2011

Geoderma

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Section: Introductionmentioning

confidence: 97%

Fragipan horizon degradation and bleached tongues formation in Albeluvisols of the Carpathian Foothills, Poland

Szymański

Skiba

2011

Geoderma

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“…Two soil‐landscape case studies are presented to evaluate the utility of traditional (second order) and high intensity (first order) soil maps in delineating HFUs. Study areas are the Shale Hills Site in central Pennsylvania (Lin et al, 2006a) and the Morgan Pond Site in southern Illinois (Wilson et al, 2009). The Shale Hills Site is located in the Northern Appalachian Ridges and Valleys Major Land Resource Area (MLRA) (USDA‐NRCS, 2006).…”

Section: Methodsmentioning

confidence: 99%

“…An intensive grid method with transects was used to conduct the first‐order soil survey for the Shale Hills Site (Soil Survey Staff, 1993; Lin et al, 2006a). For the Morgan Pond Site, soil‐landscape units were first delineated and then intensive point data were collected within each soil‐landscape unit (Wilson et al, 2009) to develop the first‐order survey. At each site, an evaluation of the soil surveys hydropedologic utility was made by analysis of intensive soil property point data, detailed soil‐landscape and geomorphic analysis, and electromagnetic induction (EMI) techniques (specifically the EM38 meter).…”

Section: Methodsmentioning

confidence: 99%

High-Intensity Soil Survey and Hydropedologic Functional Map Units

et al. 2009

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The fundamental purposes of a soil survey are to show (cartographically) the geographic distribution of the soils and make land‐use predictions about those soils. A wide array of environmental, ecological, agricultural, geological, and natural resource issues have placed greater demands on soil survey information. Traditional soil maps, soil map units, and interpretations may be inadequate when confronting these complex issues, and in particular, issues that require detailed hydrologic information.

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“…a low volume of water that can freely drain into the water table, with effects on subsurface lateral flow and surface runoff. This may result in watersaturated areas in the toe slope position or correspondence with shallower restricting layers, as documented by Wilson et al (2010) in a catchment characterized by the extensive presence of fragipan. Also Gburek et al (2006) underlined the relevance of fragipan for runoff generation and the overall hydrologic performance of the watershed.…”

Section: Introductionmentioning

confidence: 97%

Atterberg limits fail in recognizing fragipan horizons

Stanchi

Negri

D’Amico

et al. 2021

CATENA

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Fragipan is a subsurface soil horizon characterized by high bulk density, coupled with an abundance of fine, blind pores. We hypothesized that this distinctive porosity pattern could affect the Atterberg limits, with significant deviations from those of otherwise comparable soil horizons. Additionally, longer pre-wetting times might be needed to determine the liquid and plastic limits in fragipan, due to restrictions in water movements. Based on these hypotheses, our research focused on (1) assessing the most suitable fragipan-specific sample preparation time for liquid and plastic limit determination; (2) evaluating if the Atterberg limits reflect the presence of fragic properties; (3) exploring the relationships between Atterberg limits and other relevant soil properties through Artificial Neural Networks. Fragipan horizons (F) had a slightly higher liquid limit, much higher bulk density, and specific surface area than nonfragipan (NF). The plastic limit was however comparable for F and NF. Thus, fragipans had a larger interval of plasticity, which is in contrast with slaking tests and wellknown field evidence. Despite the expected differences between F and NF, three hours' pre-wetting was enough for all samples. This might be due to the size fraction used in the analysis, more sensitive to collapse upon water saturation than bigger clods. Atterberg limits did not help in discriminating F from NF, despite the relevant differences in other soil physical properties. Neural Networks showed that the transition from the plastic to the liquid state was mainly driven by texture and specific surface area, while the plasticity interval was mainly affected by the bulk density. These results provided further insights into the mechanical properties of fragipan horizons.

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Location and expression of fragic soil properties in a loess-covered landscape, Southern Illinois, USA

Cited by 26 publications

References 53 publications

Fragipan horizon degradation and bleached tongues formation in Albeluvisols of the Carpathian Foothills, Poland

Fragipan horizon degradation and bleached tongues formation in Albeluvisols of the Carpathian Foothills, Poland

High-Intensity Soil Survey and Hydropedologic Functional Map Units

Atterberg limits fail in recognizing fragipan horizons

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