Basic 12 Comparative characteristics of sand silt and clay

Comparative characteristics of sand silt and clay

Comparative characteristics of sand silt and clay

Sl.
Characteristics
Sand
Silt
Clay
1.
Size
2.0-0.02 mm
0.02-0.002 mm
Below 0.002 mm
2.
Visibility
Visible by microscope
Visible by microscope
Visible by ultra-microscope
3.
Water-holding capacity
Low
Medium
High
4.
Total pore space
Least
Medium
Highest
5.
Size of pore
Large
Medium
Very small
6.
Movement of air and water
Very rapid
Moderate
Slow
7.
Plasticity, swelling, and cohesion
Very low
Moderate
Very high
8.
Feel on rubbing between thumb and fingers
Gritty
Like flour or talcum powder
Feels very plastic and sticky when wet and become hard under dry condition
9.
Tillage
Easy
Moderate
Difficult
10.
Fertility
Very Low
Moderate
High
11.
Minerals
Quartz dominates
Feldspar, mica, hematite, limonite, quartz
Kaolinite, montmorillonite and illite
12.
Chemical activity
Chemically inactive
Slightly active
Very active

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