| ASI | Activate Sludge Inoculum |
| BI | Biodisc Inoculum |
| DGGE | Denaturing Gradient Gel Electrophoresis |
| DO | Dissolved Oxygen |
| EC | Electrical Conductivity |
| FPI | Facultative Pound Inoculum |
| H-B | Haber Bosch process |
| NFB | Nitrogen Fixing Bacteria |
| OMC | Organic Matter Content |
| OTUs | Operational Taxonomic Units |
| PCR | Polymerase Chain Reaction |
| PGPRs | Plant Growth Promoting Rhizobacteria |
| SBR | Sequential Batch Reactor |
| T0 | Treatment with no fertilization |
| T1 | Treatment with commercial Azotobacter chroococcum |
| T2 | Treatment with chemical fertilizer |
| T3 | Treatment with adapted inocula, −10% of dose |
| T4 | Treatment with adapted inocula, 100% of dose |
| T5 | Treatment with adapted inocula, +10% of dose |
| TAE | Tris base, Acetic acid and EDTA solution |
| TKN | Total Kjeldahl Nitrogen |
| TNC | Total Nitrogen Content |
| WWTP | Waste Water Treatment Plant |