character: Nitrate Reducer
topic: Nitrate Reduction Process
grade: 9
subject: Science
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character: Denitrifying Bacteria
topic: Microbial Nitrogen Cycle
grade: 9
subject: Science
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character: Ammonium Ion
topic: Nitrogen Transformation in Soil
grade: 9
subject: Science
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character: Nitrogen Cycle
topic: Importance of Nitrate Reduction
grade: 9
subject: Science
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