Mustahab, recomended, is a Islamic term denoting a actions between Mubah (neutral) and Wajib (actions which must be performed). Fard also farida (arabic فرض obligation, duty) is an Islamic term which denotes a religious duty. ...
It is Mustahab that one keeps one's Kafan and "Sidr" leaves and camphor ready during lifetime.
It is Mustahab to mix a small quantity of Turbat (soil of the land around the shrine of Imam Husayn) with camphor, but it should not be applied to those parts of the body, where its use may imply any disrespect.
It is also Mustahab that 2 pieces of fresh and green twigs are placed in the grave with the dead body.