A method and apparatus (1) for processing soil infested with plant root material. The method comprises depositing the soil on a vibrating conveyor support (105) at a substantially constant depth, wherein the vibrating conveyor support (105) is arranged to enable the plant root material to be hand-picked. In this way, soil throughput may be maximised without compromising removal of the plant root material. Further, fragmentation of the plant root material may be minimised. The soil may be screened using a vibrating screening mesh (107) to remove smaller particles prior to it being deposited on the conveyor. The soil may be heated, and the processed soil passed under an infrared detector (119) for detecting the presence of plant root material, to thereby objectively control quality.