character: Professor Jonathan Lee
topic: Soil Chemistry and Ecosystem Health
grade: 9
subject: Chemistry
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character: Dr. Emily Carter
topic: Impact of Soil pH on Plant Growth
grade: 9
subject: Chemistry
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character: Mr. Alex Harper
topic: Nutrient Cycling in Ecosystems
grade: 9
subject: Chemistry
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character: Ms. Sara Patel
topic: Sustainable Agricultural Practices
grade: 9
subject: Chemistry
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