Hi the angle of the cracks formed is almost constant and is about 45 degree(not sure). can you please tell me the exact reason for that?please I need the answer uurgently
Vertisols have high amounts (30%) shrink and swell clays (2:1) such as vermiculites and smectites. The shrink and swell characteristics are responsible for the opening and closing of the cracks in the soil depending on the moisture. These soils crack on the shear planes, when the hydration of clays exceed the shear strength from a range of 10-60 degrees above the horizontal. Not always 45 degrees. hope this helps. Soil and water scientist
