Effects of Frost Action on Soil Aggregate Stability

Mostaghimi, S.; Young, Robert A.; Wilts, A.R.; Kenimer, A. L.

doi:10.13031/2013.30727

Cited by 53 publications

(35 citation statements)

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“…2 also show that aggregate stability changed little from two to four FTCs, regardless of depth. With more FTCs, aggregate stability would almost surely decrease (Benoit 1973;Mostaghimi et al 1988) as the fitted curves in Fig. 2 suggest.…”

Section: Interaction Between Sampling Depthsmentioning

confidence: 84%

“…Only the Barnes soil decreased in stability from two to four FTCs (though again significant only at P = 0.453). Mostaghimi et al (1988), who wet sieved air-dried aggregates, found that Barnes aggregate stability decreased sharply from three to six FTCs.…”

Section: Interaction Between Soils and Freeze-thaw Cyclesmentioning

confidence: 99%

“…Climatic processes include precipitation (wetting), evaporation (drying), freezing, and thawing. In temperate regions, freezing and thawing cause stability to vary greatly (Bullock et al 1988;Lehrsch et al 1991;Mostaghimi et al 1988;Staricka and Benoit 1995). In many areas subject to freezing, wind and water erosion occur in the spring before vegetation covers clean-tilled fields.…”

mentioning

confidence: 99%

“…Ice lenses that form and enlarge during freezing are presumed to cause potential fracture planes to develop in nearby aggregates (Lehrsch et al 1991). Failure along these planes of weakness is probably responsible for the reduced stability and weakened structure of relatively wet mineral soils that undergo many FTCs (Benoit 1973;Edwards 1991;Hinman and Bisal 1968;Mostaghimi et al 1988). Results from some studies (Bisal and Nielsen 1964;Lehrsch et al 1991), however, have suggested that a small number of FTCs, up to about four, may cause stability to increase.…”

mentioning

confidence: 99%

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Freeze-Thaw Cycles Increase Near-Surface Aggregate Stability

Lehrsch

1998

Soil Science

101

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Soils with stable surface aggregates resist water and wind erosion better than soils with unstable aggregates. From earlier studies, we had preliminary evidence that one to three freeze-thaw cycles (FTCs) increased soil aggregate stability when measured by wet sieving field-moist aggregates. In this study, we measured the stability of aggregates vapor-wetted to field capacity from the Ap horizons of four soils after undergoing either zero, one, two, or four FTCs, and we determined the number of FTCs at which aggregate stability would be greatest for each soil. Moist soil was packed to a dry bulk density of 1.15 Mg M -3 by tapping it into 28-mm-diameter, 50-mm-tall brass cylinders. Each cylinder was then sealed in a polyethylene bag and inserted into a polystyrene foam tray. The soil in each cylinder was frozen convectively at -5°C for 48 h and then thawed at +6°C for 48 h for each FTC. Aggregate stability increased with the first one to two FTCs but changed little thereafter. Trend analysis revealed that aggregate stability would be greatest after two or three FTCs. When averaged across the four soils, FTCs stabilized aggregates more at 0 to 15 mm than at 15 to 30 mm. Near the surface of wet soils, two or three FTCs may be beneficial rather than detrimental to soil structure.

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Section: Interaction Between Sampling Depthsmentioning

confidence: 84%

Section: Interaction Between Soils and Freeze-thaw Cyclesmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Freeze-Thaw Cycles Increase Near-Surface Aggregate Stability

Lehrsch

1998

Soil Science

101

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“…As this water flows, it could transport via mass flow, slightly soluble bonding agents such as silica or Ca to soil particleto-particle contact points, there to be precipitated (Lehrsch et al, 1992;Perfect et al, 1990c). As an ice lens enlarges it imposes forces on nearby constrained aggregates, often weakening them, though at times strengthening them (Bullock et al, 1988;Lehrsch et al, 1991;Mostaghimi et al, 1988;Perfect et al, 1990c). An improved understanding of these forces and their modes of operation may permit us to minimize their adverse impacts on soil structure as well as maximize their beneficial impacts on soil structure.…”

Section: Introductionmentioning

confidence: 99%

Temporal Changes in Wet Aggregate Stability

Lehrsch¹,

Jolley²

1992

Transactions of the ASAE

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Aggregate stability, a property that influences a soil's erodibility and hydraulic characteristics, has been shown in previous investigations (e.g., Bullock et al., 1988) to vary over time for some northwestern U.S. soils. The objectives of this study were to evaluate three procedures for measuring aggregate stability and quantify variation in aggregate stability over time (that is, within a growing season) for selected soils across the United States. In 1988 and 1989, soils from 11 states were sampled monthly from April to July and in September. The stability of 1-to 4-mm aggregates from each sample was measured by 1) wetting air-dry (A-D) aggregates in a vaporizer followed by wet-sieving; 2) immersing A-D aggregates immediately prior to wet sieving; and 3) vapor-wetting field-moist aggregates followed by wet sieving. The sieving of vapor-wetted field-moist aggregates best revealed temporal variation. In general, the aggregate stability of northern soils varied more over time than did the aggregate stability of southern soils, probably due to differences in freezing and thawing. Biological activity likely accounted in part for temporal changes in the stability of soils from the upper Midwest. Trends in stability change over time in soils from one region of the United States to another were seldom similar.

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Temporal variation in properties of an uncropped, ploughed Miamian soil in relation to seasonal erodibility

1998

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Abstract:Knowledge of seasonal variation in soil structural and related properties is important for the determination of critical periods during which soil is susceptible to accelerated erosion and other degradative processes. The purpose of this research was to evaluate the magnitude of seasonal variations in selected soil and deposited sediment properties in relation to soil erodibility for a Miamian silt-loam soil (Typic Hapludalf) in central Ohio. Erosion plots (USLE-type) were established on a 4 . 5% slope and maintained under bare, ploughed conditions from 1988 to 1991. Particle size distribution, bulk density(r b ), percentage water stable aggregates (WSA), soil organic carbon(SOC), and total soil nitrogen (TSN) of both soil and sediment samples were monitored between Autumn 1989 and Spring 1991. The soil and sediment particle size distributions followed no clear seasonal trends. Soil r b increased following tillage (1 . 20 Mg m 73) and was highest (1 . 45 Mg m 73 ) during the autumn owing to soil slumping and consolidation upon drying. Low winter and spring values of r b and %WSA (20±50% lower than in autumn) were attributed to excessive wetness and freeze±thaw eects. Both SOC and soil TSN contents progressively declined (from 2 . 18 to 1 . 79% and 1 . 97 to 1 . 75 g kg 71 , respectively) after ploughing owing to maintenance of plots under bare, fallow conditions. Spring highs and autumn lows of sediment SOC (3 . 12 vs. 2 . 44%) and TSN (2 . 70 vs.

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Effects of Frost Action on Soil Aggregate Stability

Cited by 53 publications

References 0 publications

Freeze-Thaw Cycles Increase Near-Surface Aggregate Stability

Freeze-Thaw Cycles Increase Near-Surface Aggregate Stability

Temporal Changes in Wet Aggregate Stability

Temporal variation in properties of an uncropped, ploughed Miamian soil in relation to seasonal erodibility

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