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