Soft and sensitive soils whose shear strength is less than 15KN/m , the results are dependent on operator's skill. Even pushing the sample tubes in soil may cause some disturbance.

Experience shows that carefully controlled compression tests results can be related to figures obtained by pushing a small vane in the soil and rotating it at a controlled rate and measuring the force, required for maximum resistance. Vane Shear Test can be conducted in a Laboratory or in the field.