character: Mr. Brown
topic: The Role of pH in Soil Health
grade: 11
subject: Chemistry
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character: Dr. Green
topic: How Soil pH Affects Nutrient Availability
grade: 11
subject: Chemistry
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character: Ms. Davis
topic: Soil pH: Measuring and Adjusting for Optimal Health
grade: 11
subject: Chemistry
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character: Mr. White
topic: The Importance of Soil pH in Agriculture
grade: 11
subject: Chemistry
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