KnowraBiological nitrogen fixationLinked fromLinked fromThe 25 pages that link to Biological nitrogen fixation, each with the reason it gives.All 25Broader topic 2Related 15Narrower topic 6Compared with 2RhizobiumNarrower topic: Rhizobium is a major agricultural example of this natural source of reactive nitrogen.Root noduleNarrower topic: Root nodules are major sites of biological nitrogen fixation in agriculture.NitrogenaseNarrower topic: Nitrogenase is the enzyme system that performs this conversion.AzollaNarrower topic: It explains how Azolla gains nitrogen without relying solely on dissolved nutrients.SalvinialesNarrower topic: Azolla's cyanobacterial partner makes this ecosystem service available in cultivated fields.RhizobiaNarrower topic: Rhizobia are prominent agents of this broader natural nitrogen input.