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Y2, ns, ***- Not significant, significant 0.1%, respectively, by the test F. received nitrogen fertilization, emphasizing that, in this case, the bacteria supplied nitrogen to plants in equivalence to nitrogen fertilizer. Considering that the maximum height of the Marandu grass plants observed corresponds to the treatment with nitrogen fertilization (100%), the other treatments presented height between 62 and 65% of the maximum production (13.9 cm) in the third cut, for C1 (P<0,001), when compared to nitrogen treatment (Table I). Marandu with the associative diazotrophic bacteria MTH2 and MTB1 provides part of the nitrogen necessary for the development of the grass, contributing positively to its production. A significant difference was observed in C1 (P<0.000) with higher root dry mass in plants that received nitrogen fertilization, followed by MTB1 treatment that produced the equivalent of (47.34%) of the maximum yield. [Extracted from the article]