character: Dr. Sarah Fields
topic: Impact of Soil pH on Organic Matter Decomposition
grade: 12
subject: Chemistry
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character: Dr. John Carter
topic: Soil Chemistry and Nutrient Availability
grade: 12
subject: Chemistry
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character: Dr. Emily Johnson
topic: The Role of Microorganisms in Soil Health
grade: 12
subject: Chemistry
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character: Dr. Mark Anderson
topic: Effects of Soil Composition on Plant Growth
grade: 12
subject: Chemistry
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