character: Ms. Sarah Lee
topic: Potassium and Its Uses in Agriculture
grade: 9
subject: Chemistry
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character: Dr. James Smith
topic: Essential Nutrients for Plant Growth
grade: 9
subject: Chemistry
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character: Ms. Linda Green
topic: The Role of Fertilizers in Crop Production
grade: 9
subject: Chemistry
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character: Mr. Tom Johnson
topic: Soil Chemistry and Its Impact on Agriculture
grade: 9
subject: Chemistry
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