Microbiology of Soils
Nitrogen oxidation (nitrification)refers to the

changing of atmospheric nitrogen (N2) to nitrogen compounds
None of these
conversion of ammonium ions into nitrates through the activities of certain bacteria.
sulfur is oxidized to the sulfate form through Thiobacillus bacteria

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Microbiology of Soils
Nitrogen fixation by the microorganisms can be detected by adopting the approach of

measuring15N2 by mass spectrometer
demonstrating growth in a nitrogen free medium
cultivating the microorganisms in the presence of nitrogen labeled with isotropic nitrogen
All of these

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