character: Dr. Sarah Lee
topic: Soil pH and Nutrient Availability
grade: 12
subject: Chemistry
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character: Dr. Emily Chen
topic: Influence of pH on Plant Nutrients
grade: 12
subject: Chemistry
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character: Mr. David Kim
topic: Chemical Reactions in Soil Nutrient Cycling
grade: 12
subject: Chemistry
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character: Ms. Janet Wu
topic: Acidic vs. Alkaline Soils and Their Effect on Agriculture
grade: 12
subject: Chemistry
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