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Nitrogen cycle ELBS
AB
LightningThis burns nitrogen to make mnitrates
NitratesSoluble form of nitrogen
LegumesPeas, beans, clover
FixationBacteria in legumne root nodules turning nitrogen into nitrates
ProteinFood type containing nitrogen
humusdead and decayed organic matter
fertiliserplant food
denitrifying bacteriaThese break up nitrates to give off nitrogen
NO3Formula for nitrates
Root nodulesLumps on the roots of legumes
decayAnother name for rotting
eutrophicationProblems caused by fertilisers getting into rivers


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