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character: Ammonia-oxidizing bacteria
topic: Role in nitrogen cycle and soil health
grade: 9
subject: Biology
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character: Nitrogen cycle
topic: Importance of nitrification process
grade: 9
subject: Biology
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character: Soil microorganisms
topic: Contribution to soil fertility
grade: 9
subject: Biology
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character: Nitrifying bacteria
topic: Impact on plant growth and ecosystem balance
grade: 9
subject: Biology
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