Effect of Frost Action on Structure of Haldimand Clay

Logsdail, D. E.; Webber, L. R.

doi:10.4141/cjss59-014

Cited by 33 publications

(10 citation statements)

References 3 publications

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“…The soil moisture content at times of freezing was high, due to preceding rainfall events and cooling temperatures. Similar response of WAS to repeated freeze-thaw cycles were reported by several investigators (Mostaghimi et al, 1988;Coote et al, 1988;Edwards, 1991;Bullock et al, 1988;Logsdail and Webber, 1959). It seems that forces due to ice crystal formation break particle-to-particle bonds, thus weakening structural stability (Bullock et al, 1988;Yang and Wander, 1998).…”

Section: Year 2001supporting

confidence: 81%

Seasonal soil aggregate stability variation in relation to rainfall and temperature under Mediterranean conditions

Dimoyiannis

2009

Earth Surf Processes Landf

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Aggregate stability, one of the main factors controlling soil erodibility, varies over time. Knowledge of its variation would help to identify better soil management practices. In 10 soils from central Greece devoted to cereal cropping, seasonal wet aggregate stability (WAS) fluctuations were investigated over a period of two successive years. The wet-sieving technique of airdried aggregates was used for WAS determinations, according to a test resulting in an instability index calculation. Over the first year, when typical Mediterranean climatic conditions dominated, WAS varied according to a nearly cyclic pattern, from a low in winter or early-spring months to a high in summer months. The instability index varied from a high between 123-152% of annual average to a low between 58-83% of annual average. Total monthly rainfall (TR) and mean monthly air temperature (MAT) strongly correlated with seasonal WAS. Their ratio (TR/MAT, ombrothermic ratio) has been proved to be a good predictor of structural stability throughout the year, for most of the soils studied. Possible mechanisms deteriorating aggregation seemed to be raindrop impact, repeated soil drying and wetting and repeated soil freezing and thawing, while possible mechanisms promoting aggregation seemed to be soil drying and warming and biological activity. Over the second year, severe climatic inconsistencies complicated the seasonal pattern of WAS response. From January to March, WAS unexpectedly increased, obtaining its maximum value for most of the soils in March, then it varied inconsistently until October and thereafter decreased, obtaining its minimum value in December for all soils. The instability index varied from a high between 130-196% of annual average to a low between 61-83% of annual average. Uneven seasonal distribution of climatic characteristics and extreme events decisively modified the typical for Mediterranean conditions seasonal WAS variation pattern.

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Section: Year 2001supporting

confidence: 81%

Seasonal soil aggregate stability variation in relation to rainfall and temperature under Mediterranean conditions

Dimoyiannis

2009

Earth Surf Processes Landf

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“…Soulides and Allison (1961) were able to show a decrease in bacterial population, after wet soil was frozen at -11°C for 24h. Sudden, severe frosts have been found to eliminate most of the bacteria in exposed soils (Logsdail and Webber, 1959). Upon thawing, large flushes in respiration measured by CO2 production (Soulides andAllison, 1961) or O2 uptake (Wynn-Williams, 1982), similar to those caused by drying soil, have been noted.…”

Section: B Freezing and Soil Biologymentioning

confidence: 99%

Freezing and Its Effect on Chemical and Biological Properties of Soil

Edwards¹,

Cresser²

1992

Advances in Soil Science

145

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“…Freezing and thawing affects soil structure (Logsdail and Webber 1959;Edwards 1991) and could cause clay lattices to open, releasing fixed NH 4 + . The preponderance of accumulated soluble N in the organic form suggest the source of accumulated soil N is also organic, however.…”

Section: Early-winter Accumulation Of Soluble Soil Nmentioning

confidence: 99%

Overwinter soil nitrogen dynamics in seasonally frozen soils

Ryan¹,

Kachanoski²,

Gillham³

2000

Can. J. Soil. Sci.

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An overwinter soil-monitoring study was conducted at two sites in southern Ontario. Soluble soil N accumulation at both sites occured in early winter, peaked when soil water was frozen, and then declined during the period that frozen soil water was present. The amount of soluble soil N accumulated was 48 ± 12 kg N ha−1 at one site, and 21 ± 6 kg N ha−1 at the other. In both cases, the overwinter accumulation approximately doubled the amount of soluble N in the soil. Similar trends were observed in both mineral and organic N, with 60 to 74% of the accumulation occurring in the organic form. No clear correlations between soluble nitrogen dynamics and soil extractable organic carbon or soil microbial biomass carbon dynamics were observed. Denitrification apparently occurred in shallow soil during the thaw period at one site. Since soil nitrate levels decreased before significant thawing occurred, leaching was probably not the primary dissipation mechanism. We hypothesize that the soluble N accumulation was due to death and lysis of soil microorganims during freezing and thawing. The presence of soil ice apparently decreased the lethality of the soil enviroment, allowing N dissipation to occur. Soil N dissipation could be due to gaseous losses, and is likely related to significant N2O fluxes commonly observed during spring thaw. Key words: Nitrogen, overwinter, soil ice

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Effect of Frost Action on Structure of Haldimand Clay

Cited by 33 publications

References 3 publications

Seasonal soil aggregate stability variation in relation to rainfall and temperature under Mediterranean conditions

Seasonal soil aggregate stability variation in relation to rainfall and temperature under Mediterranean conditions

Freezing and Its Effect on Chemical and Biological Properties of Soil

Overwinter soil nitrogen dynamics in seasonally frozen soils

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