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Microbiology of Soils

Microbiology of Soils
Degree of compost maturity can be assesed by

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

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Microbiology of Soils
The diagnostic enzyme for denitrification is

none of these
nitro oxidoreductase
nitrate oxidase
nitrate reductase

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Microbiology of Soils
Which of the following is capable of oxidizing sulfur to sulfates?

Desulfotomaculum
Rhodomicrobium
Rhodospirillum
Thiobacillus thiooxidans

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Microbiology of Soils
Bacteria, as a group, are responsible for

nitrogen oxidation
sulfur oxidation
nitrogen fixation
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
VA Mycorrhiza
Candida torulopsis
Aspergillus niger

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Microbiology of Soils
The nitrogenase consists of

none of these
dinitrogenase reductase
both (a) and (b)
dinitrogenase

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