Microbiology of Soils
Nitrifying bacteria can not be isolated directly by the usual techniques employed to isolate hetrotrophic bacteria. The reasons may be due to

medium growth
none of these
slow growth
fast growth

ANSWER DOWNLOAD EXAMIANS APP

Microbiology of Soils
Denitrification is

reduction of nitrate (NO3-) to nitrogen gas
both (a) and (b)
reduction of nitrate to organic nitrogen compounds
changing of atmospheric nitrogen (N2) to nitrogen compounds

ANSWER DOWNLOAD EXAMIANS APP

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

ANSWER DOWNLOAD EXAMIANS APP