character: Dr. Sarah Johnson
topic: Impact of pH on Soil Fertility
grade: 12
subject: Chemistry
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character: Dr. Emily Carter
topic: Soil Nutrients and pH Levels
grade: 12
subject: Chemistry
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character: Dr. James Smith
topic: Chemistry of Soil Acidity
grade: 12
subject: Chemistry
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character: Dr. Anna Lee
topic: Effects of pH on Plant Growth and Soil Microorganisms
grade: 12
subject: Chemistry
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