الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Leguminous crops have great importance for human feeding as they contain considerable amounts of plant protein and some of the essential amino acids (Gupta, et al., 2005) br Cowpea (Vigna unguiculata (L.)Walp) is one of the most important legume crops in Egypt as well as in the other tropical and sub-tropical countries (Hafiz and Damarany 2006). The common cowpea is produced in Egypt as green pods or dry seeds which are favorable for the Egyptian consumers. Its dry-seeds have high percentage of protein (20 to 30%) that characterized as a complete protein compared with those of other vegetables. Also, they are rich in the essential amino acid lysine (El-Saeid, et al., 2010). br For more than 100 years, biological nitrogen fixation (BNF) has commanded the attention of scientists concerned with plant mineral nutrition, and it has been exploited extensively in agricultural practice (Zhang, et al., 2007). br However, its importance as a primary source of N for agriculture has maximized in the recent decades for increasing amounts of fertilizer-N which used more often in the production of food and cash crops (Mayz, et al., 2003). br However, international emphasis on environmentally sustainable development with the use of renewable resources focused attention on the potential role of BNF in supplying N for agriculture (Mensah et al., 2006). br The expanded interest in ecology has drawn attention to the fact that BNF is ecologically benign and that it’s greater exploitation can reduce the use of fossil fuels and can be helpful in reforestation and in restoration of misused lands to productivity (Zilli et al., 2006). br Mycorrhizae are one of the most important soil fungi. They have a symbiotic relationship with the plant roots; this association is of benefit to both the plant and the fungus. The plant receives nutrients -#102;-#114;-#111;-#109; the fungus and the fungus is fed by the plant in exchange (Bagayoko, et al., 2000). br Biomagic is microbial bioactive non hormonal foliar spray consist of some amino acids, Vitamins, nitrogen, phosphorus and different trace elements. br Thus, this study aimed to investigate the effects of multiple inoculation with rhizobacteria (Azotobacter chroococcum), symbionts (Rhizobium sp.) and Vesicular-Arbuscular Mycorrhiza (VAM) at different time intervals alone and in combination on the fresh root weight, dry root weight, fresh shoot weight, dry shoot weight, leaf chlorophyll, numbers of branches, length of the plant, nodules fresh weight, nodules dry weight, number of seeds in pod and yield. Also nitrogen content of shoot, nodules, nitrogen content of seed and phosphorus content of shoot and total microbial count, Azotobacter count, VAM colonization in plant and VAM count in soil compared with untreated plants br were studied.