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Autotrophic ammonia‐oxidizing bacteria were detected in some Bangladesh and Sri Lanka tea soils and in three other Bangladesh soils. Numbers ranged from 25 to 5500 organisms/g dry soil. Pure cultures were obtained from all the soils either by picking colonies from silica gel plates used for counts or by enrichment culture procedures. The isolates were identified as species of Nitrosolobus, Nitrosomonas and a new species of Nitrosospira .
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Bhuiya et al. (1977) studied this question.
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