Afghan President Hamid Karzai has banned the sale and possession of ammonium nitrate fertiliser which is used by Islamist insurgents to make deadly homemade bombs. An official statement today said import, production, possession, use, purchase and sale of ammonium nitrate fertiliser is banned.<br/><br/>It said based on investigations by security forces, terrorists widely use the fertiliser in making explosives and to avoid such terrorist actions any use of this substance will result in judicial prosecution. The President's decree said anyone in possession of the fertiliser must hand it over to branches of the Ministry of Agriculture within one month.