character: Mrs. Emily Brown
topic: Chemical Reactions in Soil Enhancements
grade: 12
subject: Chemistry
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character: Dr. Sarah Johnson
topic: Impact of pH on Soil Fertility
grade: 12
subject: Chemistry
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character: Mr. John Smith
topic: Nutrient Cycles and Soil Composition
grade: 12
subject: Chemistry
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character: Ms. Linda Green
topic: Organic vs. Inorganic Soil Amendments
grade: 12
subject: Chemistry
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