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Which genus is a common denitrifier in agricultural soils?

  • A.Rhizobium
  • B.Streptomyces
  • C.Pseudomonas
  • D.Nitrosomonas

Answer: C

Many Pseudomonas species respire nitrate when oxygen is scarce, making them prominent denitrifiers. Nitrosomonas oxidises ammonium in the opposite direction, Rhizobium fixes nitrogen and Streptomyces is chiefly a decomposer and antibiotic producer.

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