A Reduced Fraction of Plant N Derived From Atmospheric N (%Ndfa) and Reduced Rhizobial nifH Gene Numbers Indicate a Lower Capacity for Nitrogen Fixation in Nodules of White Clover Exposed to Long-Term CO2 Enrichment
Biogeosciences - Germany
doi 10.5194/bg-10-8269-2013
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Date
December 16, 2013
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Copernicus GmbH