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Microbiology of Soils

Microbiology of Soils
Degree of compost maturity can be assesed by

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

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Microbiology of Soils
Nitrogen fixation refers to the direct conversion of atmospheric nitrogen gas into

ammonia
glucose
ATP
nitrate

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Microbiology of Soils
The nonsymbiotic bacteria which fix nitrogen live in the soil independently are

Clostridium
Azotobacter
considerably less important in comparison to the symbiotic bacteria
All of these

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Microbiology of Soils
The crops which are involved in nitrogen fixation are

bean and lupine
all of these
soybean
alfalfa and clover

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Microbiology of Soils
Which are the main source of biofertilisers?

Cyanobacteria
Bacillus
None of these
Streptococcus

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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
denitrification
nitrogen fixation
ammonification

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