character: Mr. James Smith
topic: Chemical Properties of Soil and Their Influence on Agriculture
grade: 11
subject: Chemistry
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character: Dr. Emily Carter
topic: Soil pH Levels and Crop Yield
grade: 11
subject: Chemistry
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character: Ms. Sarah Johnson
topic: Nutrient Cycling in Agricultural Soils
grade: 11
subject: Chemistry
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character: Prof. Michael Lee
topic: The Role of Soil Organic Matter in Farming
grade: 11
subject: Chemistry
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