character: Mr. Alex Thompson
topic: Chemical Processes in Soil Ecosystems
grade: 12
subject: Chemistry
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character: Dr. Emily Carter
topic: Soil Chemistry and Nutrient Cycling
grade: 12
subject: Chemistry
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character: Ms. Sarah Johnson
topic: Microbial Activity in Soil Health
grade: 12
subject: Chemistry
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character: Prof. John Wilson
topic: Impact of pH on Soil Chemical Reactions
grade: 12
subject: Chemistry
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