Field experiments, on rice crop (Oryza Sativa L. c.v. Giza 178) grown in Meet Louza Village, Mansoura Province, Dakahlia Governorate, Egypt were conducted in 2008 and 2009 seasons on a silty clay soil. Biofertilization 8 treatments involving inoculums of Azolla (Azl), Azospirillum (Azs), Azotobacter (Azt), and Cynobacreria (Cyn) as well as mixtures (Azl + Azs), (Azl + Azt) (Azs + Azt) and (Cyn + Azt), soil N-fertilization (4 treatments of no-N, portions of 50 %, 75 % and 100 % of N-recommended level of 60 kg N fed^-1 as urea), and foliar spray of (2 treatments of yeast extract only, and yeast extract + 2 % N) were tasted in a randomized complete block design (factorial) involving the 3 above mentioned factors. Execution of experiment was a split- split plot with three replicates. The highest grain yields of (3.99 and 4.07 metric t fed^-1) in 1^st and 2^nd seasons occurred with the treatment of (Cyn + Azt) + 50 % N-level + (2 % N + yeast). The highest straw yields were given by (Cyn + Azt) + 100 % N-level+ yeast which gave 3.94 metric t fed^-1 in 1^st season, or by (Cyn + Azt) + 100 % N- level+ (2 % N + yeast) which gave 4.10 metric t fed^-1. The highest weight per plant (at booting stage) was due to (Azs + Azt) + 50 % N-level + (2 % N + yeast) which were125.14 and 137.65 g dry matter plant^-1 in 1^st and 2^nd seasons, respectively. The highest N-uptake by grains of 59.84 and 66.62 kg fed^-1 for 1^st and 2^nd seasons, respectively occurred with (Azl) + 100 % N-level +(2 % N + yeast). The highest P-uptake by grains occurred with (Azl + Azt) + 50 % N-level  (2 % N + yeast) which gave (7.51 and 9.46 kg fed^-1) in 1^st and 2^nd seasons, respectively. The highest  K-uptake occurred with (Cyn + Azt) + 50 % N-level + (2 % N + yeast) which gave 12.76 and 14.62 kg fed^-1 in 1^st and 2^nd seasons respectively. The highest Fe-uptake of 259.89 and 308.44 g fed^-1 in 1^st and 2^nd seasons respectively, were given by (Azs + Azt) +  75 % N-level + (2 % N + yeast).  The highest Mn-uptake of 185.36 and 214.18 g fed^-1 in 1^st and 2^nd seasons respectively occurred with (Cyn + Azt) + 100 % N-level + (2 % N + yeast). The highest Zn-uptake of 151.52 and 171.52 g fed^-1 in 1^st and 2^nd seasons, respectively occurred with (Azl + Azs) + 50 % N-level + yeast.