Escobar, C., Horna, Y., Carreño, C. and Mendoza, G. 2011. Characterization of native strains of Azotobacter spp. and its effect on growth of Lycopersicon esculentum Mill. “tomato” in Lambayeque. Scientia Agropecuaria. 2, 1 (Feb. 2011), 39-49. DOI:https://doi.org/10.17268/sci.agropecu.2011.01.05.