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Soil cohesion as affected by freezing, water content, time and tillage

Bullock, M.S. and Kemper, W.D. and Nelson, S.D. (1988) Soil cohesion as affected by freezing, water content, time and tillage. Soil Science Society of America Journal. 52(3):770-776.

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This study was developed to determine whether there are substantial
annual changes in soil cohesion and to identify major factors
causing those changes. Aggregate stability was measured throughout
the year on soils in Utah and Idaho using wet sieving techniques.
Stability generally increased during spring and summer months.
Major decreases of cohesion, found when minimum daily air temperatures
fell to or below 0 °C during winter and early spring months,
were attributed to pressures and associated shearing forces caused
by freezing at high water contents. Equivalent disruption occurred
when confined soils were frozen in controlled laboratory studies.
Disruption also increased as water content at the time of freezing
increased for all soils studied. Disruption of soil by rototilling and
compaction significantly decreased soil cohesion.

Item Type: Article
NWISRL Publication Number: 0653
Subjects: Soil > Tillage
Mass Import - autoclassified (may be erroneous)
Depositing User: Dan Stieneke
Date Deposited: 20 Nov 2010 21:53
Last Modified: 06 Jan 2017 21:10
Item ID: 499