soil cohesion
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Reprinted fromVolume
677 South
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Soil Cohesion as
W. D
ABSTRACT
Cohesion increased for several months after disrup
soils. Rate at which cohesion increased was slower
but continued for years. Mo duli of rupture of soils awith time. Effects of wa ter content on the rate at w
increases are compatible with an explanation of the b
anism in terms of slightly soluble components dif
cementing points of contact between particles. Cohesio
to water are estimated and found to be large enough
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P ortneuf S i lt Loom
Stored for1 yeat 1
iF6 0
1002
OI
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---------
a_
uj40
re
re
0- 0
0
7
0
100
70
10
7
,--Leached with coicic top waterupturedat these water cont
. 10 cured at Indicated H2O co
oven dried prior to rupturing
•
KEMPER & ROSENAU: SOIL
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1004Ofect of water content immediately prior to ion the disintegrating force during the wetbility determination. As indicated in Fig. 2, rupting aggregates are strong when those aare dry before immersion, but are minimal
aggregates have high water contents prior sion. Consequently, it is likely that cohesioand Gilmans Webster loam at 0=0.31 mtinued to increase after the first two days,the aggregates w ere already stable against th
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O 0.1 e•
8 8Son Water Suctiono
u--8(P, -PO
Modulusof„,Rupture
O
0
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1006O564.
2. Briggs, Lyman J. 1950. Limiting negative pressureAppl. Phys. 21:721-722.
3. Kemper, W.D., J.S. Olsen, and Alan Hodgdon. 197method as a determinant of large size pore persistenstrength of cultivated soils. Soil Sci. Soc. Am. Proc.
4. Kemper, W.D., and R.C. Rosenau. 1985. Aggregate size distribution. In A. Klute (ed.) M ethods of soil a1, 2nd ed. Agronomy 9 (in press).
5. Kirkham, Don, M.P. DeB oodt, and L. DeL eenheer.