Microbiology of Soils
__________ play a key role in the transformation of rock to soil.

Pectin decomposing bacteria
Cyanobacteia
Nitrifying bacteria
De-nitrifying bacteria

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Microbiology of Soils
Nitrogen oxidation (nitrification)refers to the

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

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