character: Dr. Emily Carter
topic: Soil Chemistry and Nutrient Cycling
grade: 12
subject: Chemistry
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character: Professor John Smith
topic: Soil Structure and Fertility
grade: 12
subject: Chemistry
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character: Dr. Maria Gonzalez
topic: Environmental Impacts of Soil Contamination
grade: 12
subject: Chemistry
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character: Dr. Alan Thompson
topic: Micronutrients in Plant Growth
grade: 12
subject: Chemistry
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