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Abstract The application of Azospirillum Inoculation as biofertilizer alleviated the dangerous effect of salt stress on wheat plants. Application of NaCL as Salt strss decreased plant growth parameters and enzymes activity Application of Azospirillum Inoculation biofertilizer single or combined stimulated microbial enzymes activity in the rhiosphere soil. The results demonstrated significant variations in respective spectral characteristics related to the reflectance values over visible (VIS) and near infrared (NIR) ranges. The results further showed a clear difference in the combined shape of spectral signature and the wavelength-locality from 500 to 700 nm. It is also obvious that the spectral signature collected from red-edge from 670 to 750 and NIR from 700 to 1100 showed clearin reflectance value under different salinity treatments. The SRI extracted from VIS regions or red-edge with visble showed the highest R2 value with measured parameters. For example, RSI458,666 presented the highest R2 (0.79) with SFW, RSI608,604 presented the highest R2 (0.64) with SDW and R2 (0.72) with yield of tomato as well as, RSI654,652 presented the highest R2 (0.64) with DHA and R2 (0.59) with CO2. REFERENCES 62 6. REFERENCES Abd El-Hamid, E.A.M., El-Hawary, M.N.A., Khedr, Rania. A., Shahein, Alaa M.E.A., (2020). Evaluation of some bread wheat genotypes under soil salinity conditions. J. Plant Product., Mansoura Univ. 11 (2), 167–177. Agricultura sustentável e conservação dos solos. Processos de degradação do solo. Salinização e sodificação. Ficha informativa no 4. Disponível em < http://soco.jrc.ec.europa.eu/documents/PTFactSheet-04.pdf> Acesso em 05/06/2011. Agricultural Salinity Assessment and Management. (1990). K.K. Tanji, Editor. American Society of Civil Engineers, New York, N.Y. Ahmad, I. and K.M. Khan (1988). Studies on enzymes activity in normal and saline soils. 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Soil Science Society of America, Madison, WI, USA. Pp. 247-272. difference in the short. term response of nitrogenase activity (C2H2 reduction) to difference in the short. term response of nitrogenase activity (C2H2 reduction) to |