Abstract: A soil sampler assembly includes an adjustable frame to facilitate its mounting on a motor vehicle. A motor of the sampler assembly is mounted so its vertical position can be adjusted to permit obtaining soil samples of significant depth by adjusting the motor to a lower-most position relative to the vehicle. The motor is of the hydraulic type and is powered with a portable electric motor driven hydraulic pump and a four-way valve control. The soil sampler assembly can be quickly and easily mounted on or dismounted from a motor vehicle such as a pick-up truck.