character: Dr. Emily Grant
topic: Chemical Properties of Soils
grade: 12
subject: Chemistry
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character: Dr. James Wood
topic: Soil pH and Nutrient Availability
grade: 12
subject: Chemistry
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character: Prof. Sarah Liu
topic: Organic Matter in Soil Chemistry
grade: 12
subject: Chemistry
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character: Dr. Michael Reed
topic: The Role of Soil Minerals in Fertility
grade: 12
subject: Chemistry
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