Bio-Fertilizers as a partial alternative to chemical NPK fertilization and its influence on the productivity of fennel plants ( Foeniculum vulgare, Miller ) (Hort. Dept. , Fac. Agric., Moshtohor, Benha University , Egypt.) The third Conf. of Sustain. Agric. Develop. Fac. of Agric, Fayoum Univ., 12-14 Nov. (327-352).