character: Ms. White
topic: Soil Chemistry and Organic Farming
grade: 11
subject: Chemistry
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character: Dr. Green
topic: Nutrient Cycling in Organic Agriculture
grade: 11
subject: Chemistry
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character: Mr. Brown
topic: The Role of pH in Soil Health
grade: 11
subject: Chemistry
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character: Ms. Black
topic: Understanding Soil Microorganisms
grade: 11
subject: Chemistry
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