Therefore bacterial alginates, isolated from Pseudomonas and Azotobacter
, serve as the alternative and promising tool to fulfill the requirements.
Isolation of Rhizobium (1888), Azotobacter
(1901) and Azospirillum (1925) as N-fixing organisms were reported by Beijerinck.
Several studies have reported that the genus Azotobacter
does not present high levels of solubilization.
In Argentina, the diversity of Azotobacter
in soils has not yet been studied and any Azotobacter-based biofertilizers have been developed.
Bio-fertilizers application is an important key for maximizing the yield of crop, Azotobacter
and Azospirillum are potential bio-fertilizers which are capable to contribute nitrogen to a number of non-leguminous crops.
Pseudomonas putida, Azotobacter
beijerinckii, Bacillus subtilis and Lactobacillus acidophilus were present in the rhizosphere soil but absent from rhizoplane and non-rhizosphere soil.
Seasonal fluctuations are attributive to spore-forming bacteria, including Azotobacter
and nitrifying bacteria.
vinelandii, Erwinia tasmaniensis y Raoultella planticola (Tabla 6).
chroococcum, Beijerinckia fluminensis, Azotobacter
paspali, Derxia spp., Paenebacillus azotofixans) como associativos (Azospirillum spp.
AK2, Pseudomonas fluorescens AK30, Azotobacter
diazotrophicus AK14, Microbacterium sp.