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Num Mark Subjects (1-5 of 5) Year Entries
36 Found
1 Nitrogen -- Fixation.   28
2 Nitrogen -- Fixation -- Analysis. : Measuring plant-associated nitrogen fixation in agricultural systems / Murray Unkovich ... [and others]  2008 1
3 Nitrogen -- Fixation -- Congresses   3
4 Nitrogen Fixation -- genetics   2
5 Nitrogen Fixation -- physiology   2
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