Four non-leguminous Nitrogen Fixing plants

Four non-leguminous Nitrogen Fixing plants:-
Some non-leguminous plants have been reported to fix atmospheric nitrogen.
i. Association between Sugarcane and endophytic bacteria Gluconacetobacter diazotrophicus.
ii. Association of tropical grasses such as Digitaria sp. and Paspalum sp. with Azospirillum sp.
iii. association of Coffee and Maize with Burkholderia sp.