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Microbiology of Soils

Microbiology of Soils
Degree of compost maturity can be assesed by

germination test
None of these
infrared technique
both (a) and (b)

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Microbiology of Soils
The phenomenon of commensalism refers to a relationship between organisms in which

None of these
both the species of a pair benefit
one species of a pair benefits
one species of a pair is more benefited

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Microbiology of Soils
The transformation of nitrates to gaseous nitrogen is accomplished by microorganisms in a series of biochemical reactions. The process is known as

nitrification
ammonification
denitrification
nitrogen fixation

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

Pectin decomposing bacteria
Nitrifying bacteria
De-nitrifying bacteria
Cyanobacteia

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Microbiology of Soils
The organisms responsible for the characteristic musty or earth odor of a freshly plowed field is/are

Micromonospora
Streptomyces
all of these
Nocardia

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Microbiology of Soils
The diagnostic enzyme for nitrogen-fixing organisms is

nitrate reductase
none of these
nitrate oxidase
nitrogenase

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