character: Professor James Carter
topic: Nutrient Cycling in Soil Ecosystems
grade: 12
subject: Chemistry
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character: Dr. Emily Thompson
topic: Soil Fertility and Plant Growth
grade: 12
subject: Chemistry
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character: Dr. Alex Rivera
topic: The Role of Microorganisms in Nutrient Cycling
grade: 12
subject: Chemistry
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character: Professor Sarah Lee
topic: Impact of Soil Composition on Ecosystems
grade: 12
subject: Chemistry
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