The method of hand picking is used to separate those mixtures where one of the component is in small quantity.
The method of hand picking is used to separate undesirable substances such as small pieces of stones from wheat, rice and pulses.
The food grains containing small pieces of stones are taken in a flat container. The pieces of stones are picked up from the grains by hands, one by one, and thrown away. All the stone pieces are removed and only food grains are left behind.