The KOMATSU PC 195 LC is a heavy-duty excavator commonly used in construction and excavation projects. In this scenario, the excavator is being used to dig soil in a garden. The operator of the machine is likely using the bucket attachment to scoop up soil and deposit it elsewhere, such as in a truck or pile on site. The excavator may be moving back and forth, or rotating in place to access different areas of the garden. The depth and amount of soil being dug up will depend on the specific needs of the project. It is important for the operator to be skilled in using the machine to ensure safe and efficient operation.