character: Dr. Lisa Wong
topic: Impact of Soil pH on Microbial Activity
grade: 12
subject: Chemistry
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character: Professor John Smith
topic: Soil Chemistry and Its Effects on Plant Growth
grade: 12
subject: Chemistry
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character: Dr. Emily Zhang
topic: Microbial Diversity in Varying Soil pH Levels
grade: 12
subject: Chemistry
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character: Dr. Michael Brooks
topic: The Role of Soil pH in Nutrient Availability
grade: 12
subject: Chemistry
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