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Azotobacter vinelandii
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{{Short description|Species of bacterium}} {{Speciesbox | genus = Azotobacter | species = vinelandii | authority = [[Jacob Goodale Lipman|Lipman]] 1903<ref>{{cite book| title=Review of American Chemical Research | volume=10 | year=1904 | editor=William A. Noyes | page=[https://books.google.com/books?id=LAoSAAAAIAAJ&pg=PA75 75]}}</ref> }} '''''Azotobacter vinelandii''''' is [[Gram-negative]] [[diazotroph]] that can fix [[nitrogen]] while grown [[aerobic organism|aerobically]].<ref>{{Cite web|url=https://www.explogrow.com/farming-with-microbes/why-reduce-npk-applications-when-using-17-beneficial-microbes-in-this-bio-organic-fertilizer|title=Why it is possible to reduce Nitrogen fertilizers by using Azotobacter sp|last=Young |first=Mark |access-date=14 June 2018}}</ref><ref>{{cite journal|vauthors=Requena N, Baca TM, Azcon R |date=1997 |title=Evolution of humic substances from unripe compost during incubation with lignolytic or cellulolytic microorganisms and effects on the lettuce growth promotion mediated by Azotobacter chroococcum |journal=Biol Fertil Soils |volume=24 |pages= 59β65|doi=10.1007/BF01420221 |s2cid=29624954 }}</ref> These [[bacteria]] are easily cultured and grown. ''A. vinelandii'' is a free-living N<sub>2</sub> fixer known to produce many [[phytohormone]]s and [[vitamin]]s in soils. It produces fluorescent [[pyoverdine]] pigments.<ref>{{cite journal | vauthors = Menhart N, Thariath A, Viswanatha T | year = 1991 | title = Characterization of the pyoverdines of Azotobacter vinelandii ATCC 12837 with regard to heterogeneity | journal = Biology of Metals | volume = 4 | issue = 4| pages = 223β32 | doi=10.1007/bf01141185| pmid = 1838001 | s2cid = 8712926 }}</ref>
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