ABSTRACT The research, which entitled "The usage of ex soil OST fertilizer on yield of shallot (Allium ascalonicum L.)", had been conducted from Juny to August 1991 at Green House Faculty Agriculture of University Tidar Magelang. The alti- tude is 376 m and regosol soil type, pH 6,7. The experiment was use in a randomazed complete, design (RCD), as for 4 (four) level with 1 (one) fa…