Microbiology of Soils
The population of algae in soil is __________ that of either bacteria or fungi.

equal to
generally greater than
generally smaller than
none of these

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Microbiology of Soils
Nitrogen oxidation (nitrification)refers to the

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

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Microbiology of Soils
The groups of symbiotic bacteria, which have the ability to fix nitrogen

grow together for a mutual benefit is called symbiosis and so these bacteria are called symbiotic nitrogen-fixing bacteria
these bacteria are from the genus, Rhizobium
All of these
derive their food and minerals from the legume, and in turn they supply the legume with some or all of its nitrogen

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