Inoculation, co-inoculation and nitrogen fertilization in soybean culture

The objective was to evaluate the inoculation, co-inoculation with bacteria B. japonicum and A. brasilense in combination application of N doses on agronomic characteristics soybean. design used randomized blocks a 4x4 factorial scheme, four types inoculation (absence bacteria, brasilense) (0 % = 0; 2 4.5; 4 9 8 18 kg ha-1), replications. increasing above 2% promoted reduction number nodules formed by roots. root dry mass higher at dose 8% N, an average 317 per plant 23.42 g plant-1 referring treatment inoculant brasilense. nodulation efficiency obtained value 354 kg-1 when used. if co-inoculation. practice nitrogen fertilization resulted increase only for significant gains N.