A field experiment was performed at Kaha Vegetable Research Station, Horticultural Research Institute during the two successive summer seasons of 1997 and 1998 to compare the effect of organic, mineral and biofertilizers on soil chemical composition, growth as well as flowering of tomato plants.                 Biofertilizers were used as phosphorein, microbien and rhizobacterin compounds at rates of 1kg, 2 kg, and 3 kg / fed for each. Organic manure fertilizer in the form of chicken manure was used at two rates, i.e., 10m³ and 15 m³ / fed as single application or combined with the same biofertilizers rates.                 NPK mineral fertilizer was used at four levels, i.e., the recommended level for tomato crop (120 kg N + 45 kg P₂O₅ + 96 kg K₂O / fed) as control, 25 %, 50 %, 75 % from NPK recommended fertilizers. The separate organic and biofertilizers plots did not receive any doses from the mineral fertilizer.                 The obtained results indicated that chicken manure at 15 m³ / fed in the presence of mixture of phosphorein, microbien and rhizobacterin at rate of 3 kg / fed of each was the most favourable treatment in reducing soil pH, increasing N, P soil content with significant increment on the different parameters of vegetative growth and flowering of tomato plants. The second superior treatment was 10 m³ chicken manure plus the mixture of biofertilizers followed by 50 % or 25 % NPK recommended mineral fertilizer in the prersence of biofertilizer mixture.