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Microbiology of Soils

Microbiology of Soils
An example of a symbiotic nitrogen fixer is

Rhizobium
Clostridium
Beijerinckia
Azotobacter

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Microbiology of Soils
Which of the following is not the biofertilisers producing bacteria?

Nostoc
Clostridium
Anabaena
Both (a) and (b)

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Microbiology of Soils
Denitrification is carried out

usually by facultative anaerobes
predominantly by Bacillus spp
predominantly by Pseudomonas spp
All of these

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Microbiology of Soils
Which of the following fungi on infecting crop roots can improve their uptake of phosphorus and other nutrients?

Saccharomyces cerevisiae
Aspergillus niger
Candida torulopsis
VA Mycorrhiza

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Microbiology of Soils
Which are the main source of biofertilisers?

Cyanobacteria
Streptococcus
Bacillus
None of these

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

ammonia
nitrate
glucose
ATP

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