Two field experiments were carried out at El-Serw agricultural Research Station, Governorate of Damietta through growing summer seasons of 2014 and 2015. The aim of the investigation is to study the effects of N bio fertilization (cyanobacteria, Azotbacter, Phosphorine and without inoculation), mineral sulfur applications (0, 15 and 30 kg S fed^-1) and mineral nitrogen fertilization (0, 60 and 120 kg fed^-1) on growth of the maize crop. Results showed that Cyanobacteria inoculation + 30 kg S fed^-1 + 120 kg N fed-¹ gave the highest maize plant height, dry weight, 100 grains weight of maize and maize grain and stover yield. Moreover, results indicated that the element N at a rate of 120 kg fed^-1 with 30 kg S fed^-1 with phosphorin, azotobacter and Cyanobacteria inoculation can increase the maize grain yield by 21.52, 22.95 and 24.45%, respectively and the maize stover yield by 21.01, 23.25 and 24.68%, respectively in first season but the increasing in the second season was as follows: 21.49, 22.95 and 24.42%, respectively for maize grain yield and 21.03, 23.25 and 24.67%, respectively for maize stover yield.