Field experiment was carried out at an organic Farm during 2005- 2006 and 2006-2007 seasons. This experiment was carried out to study the efficiency of biofertilization and compost amendment in presence of T. harzianum on some soil enzymes, available nitrogen, phosphorus and potassium, growth characteristics and yield of Marjoram. Obtained data showed that higher records of nitrogenase and phosphatase were observed with dual application of biofertilization and organic manuring in presence of T. harzianum rather than each one individually. Similar trend of results was observed with available N, P and K since the available N, P and K records were the highest in dual application of biofertilization and organic manuring. There isn't significant difference of herb yield between the treatments of chemical fertilization and biofertilization treatments.
key words: Marjoram, biofertilization, organic manuring, T. harzianum, nitrogenase, phosphatase and marjoram herb yield.