Today Secretary of the Security Council at the RA President, Defense Minister Serge Sargsyan and Head of the OSCE Yerevan Office, Ambassador Vladimir Pryakhin signed a memorandum on utilization of rocket propellant, RA MOD Spokesman, Colonel Seyran Shahsuvaryan told PanARMENIAN.Net reporter. The propellant will be processed in an ecologically clean fertilizer.