Two experiments were carried out during two successive seasons of 2006-2007 and 2007-2008 at Kaha Experimental Station, Kaluobia Governorate, Horticultural Research Institute on pepper plants  cv  Sonar to study the effect of using chicken manure at the rate of 2 m³ / green house or compost at the of 1,2 and 3 m³ / green house as well as effective micro organisms (EM) and slow release fertilizers, urea formaldehyde (enciabein) on vegetative growth characters at 75 and 150 days from transplanting, early and total yields, fruit characters as well as T.S.S., ascorbic acid (Vit. C) and nitrate accumulation. Applying 3m³ of compost / green house led to significantly increased and the highest values of plant height, number of branches and leaves, total leaf area, fresh and dry weight of leaves and stem per plant as well as early and total yield/ m², fruit weight and ascorbic acid (Vit. C). However, organic fertilizers non significantly affected on plant height in the second samples of the first season and in the first and second samples in the second season as well as number of branches in the second samples in the second season, fruits weight of early yield, fruits number of total yield in the second season, dry matter percentage, T.S.S and flesh thickness of fruit in both seasons. Application EM significantly affected and caused the highest values of vegetative growth characters, early and total yield as well as fruit quality followed by enciabein in both seasons. The highest total yield of fruit were obtained with application the combined 3m³ of compost with EM followed by 2 m³ of compost with EM and increasing by 98% and 73%, respectively in the first season and 67% and 50%, respectively in the second seasons as comparing with applying 2 m³ chicken manure alone. Inoculation organic fertilizers (chicken manures or compost at different levels) with EM reduced nitrate accumulation in pepper fruits.