character: Dr. Emily R. Johnson
topic: Chemical Properties of Soil and Their Impact on Plant Life
grade: 12
subject: Chemistry
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character: Dr. Robert M. Green
topic: Soil pH and its Effect on Nutrient Availability
grade: 12
subject: Chemistry
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character: Ms. Sarah L. Thompson
topic: The Role of Soil Microorganisms in Plant Health
grade: 12
subject: Chemistry
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character: Professor James T. Carlisle
topic: Impact of Soil Composition on Agricultural Productivity
grade: 12
subject: Chemistry
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