character: Dr. Robert Wilson
topic: Microbial Activity and Soil Health
grade: 9
subject: Science
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character: Dr. Jane Smith
topic: Soil Microorganisms and Ecosystems
grade: 9
subject: Science
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character: Dr. Emily Chen
topic: The Role of Bacteria in Soil Fertility
grade: 9
subject: Science
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character: Dr. Michael Johnson
topic: Impact of Soil Health on Plant Growth
grade: 9
subject: Science
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