character: Mr. Tom Brown
topic: Soil Chemistry and Plant Nutrition
grade: 12
subject: Chemistry
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character: Dr. Jane Smith
topic: Fundamentals of Soil Science
grade: 12
subject: Chemistry
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character: Ms. Emily White
topic: Plant Nutrient Cycle and Management
grade: 12
subject: Chemistry
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character: Mr. Richard Green
topic: Effects of Soil pH on Plant Growth
grade: 12
subject: Chemistry
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