character: Dr. Smith
topic: Analyzing Soil Quality through Chemical Tests
grade: 9
subject: Chemistry
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character: Ms. Johnson
topic: Introduction to Soil Chemistry
grade: 9
subject: Chemistry
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character: Mr. Lee
topic: Environmental Impact of Soil pH
grade: 9
subject: Chemistry
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character: Dr. Patel
topic: Organic vs Inorganic Soil Amendments
grade: 9
subject: Chemistry
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