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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 .