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2. INTRODUCTION
• Chemical weathering results in the formation of groups of
crystalline particles of colloidal size(<.002mm) is known
as clay mineral.
• Soil structure means the geometrical arrangement of
particle in a soil mass, relative to each other and the
forces acting between them to hold them together in their
positions.

3. INTRODUCTION
• Clay minerals are layer silicates that are formed usually as
products of chemical weathering of other silicate minerals at
the earth's surface. They are found most often in shales, the
most common type of sedimentary rock.
• Chemical weathering results in the formation of groups of
crystalline particles of colloidal size(<.002mm) is known as
clay mineral.
• Soil structure means the geometrical arrangement of particle
in a soil mass, relative to each other and the forces acting
between them to hold them together in their positions.

4. INTRODUCTION
• Clay minerals are layer silicates that are formed usually as
products of chemical weathering of other silicate minerals at
the earth's surface. They are found most often in shales, the
most common type of sedimentary rock.
• Chemical weathering results in the formation of groups of
crystalline particles of colloidal size(<.002mm) is known as
clay mineral.
• Soil structure means the geometrical arrangement of particle
in a soil mass, relative to each other and the forces acting
between them to hold them together in their positions.