physical properties of soils ges175, science of soils
TRANSCRIPT
Physical Properties of SoilsPhysical Properties of Soils
GES175, Science of SoilsGES175, Science of Soils
Particle Size
* Physical properties are influenced by particle size
Size Classification (USDA):
Soil < 2 mm
Sand, 2 - 0.05 mm
Silt, 0.05 - 0.002 mm
Clay, <0.002 mm
Textural TriangleTextural Triangle
Clay
SiltSandLoamy Sand
Sandy Loam
Sandy Clay Loam
Silt LoamLoam
Clay LoamSilty Clay
Loam
SiltyClay
Percent SiltPerc
ent C
lay
Percent Sand
40
60
75
90
55
35
20
10
SandyClay
70 50 20
Loamy/Silty Soils
(medium textured)
Silt
Sandy Clay Loam
Silt LoamLoam
Silty ClayLoam
60
75
90
35
20
70 50 20
---- Prizmatic ----
Structure:Subsurface
Increased length in vertical direction
- lateral stress > vertical stress