character: Dr. Emily Carter
topic: The Importance of pH in Soil Health
grade: 12
subject: Chemistry
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character: Mr. John Smith
topic: Understanding Soil Composition and its Chemical Properties
grade: 12
subject: Chemistry
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character: Dr. Sarah Thompson
topic: The Role of Nutrients in Soil Fertility
grade: 12
subject: Chemistry
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character: Professor David Lee
topic: Impact of Soil pH on Plant Growth and Crop Yield
grade: 12
subject: Chemistry
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