character: Ms. Brown
topic: The Effect of pH on Soil Nutrients
grade: 12
subject: Chemistry
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character: Dr. Smith
topic: Understanding Soil Chemistry
grade: 12
subject: Chemistry
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character: Mr. Johnson
topic: Nutrient Availability in Different pH Levels
grade: 12
subject: Chemistry
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character: Ms. Lee
topic: The Role of pH in Plant Growth
grade: 12
subject: Chemistry
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