The number of CFUs of these groups in each municipality varied as follows: for the farms located in the northern subregion, specifically in Entrerrios and Belmira, the values obtained for heterotrophic bacteria, proteolytic bacteria, nitrogen-fixing bacteria
that use glucose as a carbon source, nitrogen-fixing bacteria
that use malate as a carbon source, and Actinobacteria were, on average, 2.6 x [10.sup.5], 5.8 x [10.sup.5], 5.4 x [10.sup.4], and 7.5 x [10.sup.3] CFU/g of dry soil, respectively, for both municipalities.
Amplified ribosomal DNA restriction analysis for the characterization of Azotobacteraceae: A contribution to the study of these free-living nitrogen-fixing bacteria
. Journal of Microbiological Methods, 2004; 57:197-206.
N-Fix constitutes a technique with great benefits regarding the use of nitrogen fertilizers, offering alternatives of using clean technologies that guarantee adequate food safety; while in the current market of nitrogen-fixing bacteria
(for example rhizobia) is limited to a few crops of legumes, the market for bacteria that fix nitrogen internally in plant cells (N-Fix) offer access to all crop species in the world, drastically reducing the amount of synthetic nitrogen produced in the planet.
In practice, countries such as England were already importing significant quantities of nitrogen in the form of food and fiber, which meant that they were drawing on the activity of nitrogen-fixing bacteria
in distant places.
His major breakthrough came when he found a specific strain of nitrogen-fixing bacteria
in sugar-cane which he discovered could intracellularly colonise all major crop plants.
Free-living nitrogen-fixing bacteria
in Egiptian soil and their possible contribution to soil fertility.
Frankia are nitrogen-fixing bacteria
that live symbiotically in the roots of actinorhizal plants.
In recent years various novel endophytic nitrogen-fixing bacteria
have been discovered, such as Acetobacter diazotrophicus (Cavalcante and Dobereiner, 1988), Herbaspirillum seropedicae (Baldani et al., 1986a), and "Pseudomonas" Rubrisubalbicans, now established as a second species of Herbaspirillum (Baldani et al., 1996), Azoarcus spp.
Studies on nitrogen-fixing bacteria
of the genus Beijerinckia.
Essex, a new lentil variety developed by ARS scientists, offers high seed yields for growers, nitrogen-fixing bacteria
for wheat crops, and is a tasty source of protein for consumers who can add it to soups, salads and other fare.
ARS maintains a collection of these nitrogen-fixing bacteria
in Beltsville, and this resource, which has more than 5,000 specimens, was used to help Iraqi scientists rebuild their collection.