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Microbiology of Soils

Microbiology of Soils
The physical structure of soil is improved by the accumulation of

minerals
water
mold mycelium
all of these

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Microbiology of Soils
Assimilative denitrification is done by

plants
all of these
fungi
prokaryotes

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Microbiology of Soils
Which of the following soil microorganism is involved in the reduction of sulfates to H2S?

Rhodospirillum
Rhodomicrobium
Desulfotomaculum
Thiobacillus thiooxidans

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Microbiology of Soils
The microbial ecosystem of soil includes

None of these
biotic components of soil
biotic and abiotic components of soil
abiotic components of soil

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

Nocardia
all of these
Streptomyces
Micromonospora

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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?

VA Mycorrhiza
Candida torulopsis
Aspergillus niger
Saccharomyces cerevisiae

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